diff --git a/README.md b/README.md
index 77fc8e2..cbaae5f 100644
--- a/README.md
+++ b/README.md
@@ -294,17 +294,126 @@ The following options are supported via the main options object passed to `useTa
 
 The following options are supported on any column object you can pass to `columns`.
 
+- `accessor: String | Function`
+  - **Required**
+  - This string/function is used to build the data model for your column.
+  - The data returned by an accessor should be **primitive** and sortable.
+  - If a string is passed, the column's value will be looked up on the original row via that key, eg. If your column's accessor is `firstName` then its value would be read from `row['firstName']`. You can also specify deeply nested values with accessors like `info.hobbies` or even `address[0].street`
+  - If a function is passed, the column's value will be looked up on the original row using this accessor function, eg. If your column's accessor is `row => row.firstName`, then its value would be determined by passing the row to this function and using the resulting value.
+- `id: String`
+  - **Required if `accessor` is a function**
+  - This is the unique ID for the column. It is used by reference in things like sorting, grouping, filtering etc.
+  - If a **string** accessor is used, it defaults as the column ID, but can be overridden if necessary.
+- `columns: Array<Column>`
+  - Optional
+  - A nested array of columns.
+  - If defined, the column will act as a header group. Columns can be recursively nested as much as needed.
+- `show: Boolean | Function`
+  - Optional
+  - Defaults to `true`
+  - If set to `false`, the column will be hidden.
+  - If set to a `function`, it will be called with the current table instance and can then return `true` or `false`.
+  - The data model for hidden columns is still calculated including sorting, filters, and grouping.
+- `Header: String | Function | React.Component => JSX`
+  - Optional
+  - Defaults to `({ id }) => id`
+  - Receives the table instance and column model as props
+  - Must either be a **string or return valid JSX**
+  - If a function/component is passed, it will be used for formatting the header value, eg. You can use a `Header` function to dynamically format the header using any table or column state.
+- `Cell: Function | React.Component => JSX`
+  - Optional
+  - Defaults to `({ value }) => value`
+  - Receives the table instance and cell model as props
+  - Must return valid JSX
+  - This function (or component) is primarily used for formatting the column value, eg. If your column accessor returns a date object, you can use a `Cell` function to format that date to a readable format.
+
 ### Table Output
 
-- `columns: Array<Column>`
-  - A flat array of all final column objects computed from the original columns configuration option.
-- `columns[].`
-- `headerGroups: Array<Array<Column>>`
+The following properties are available on the table instance returned from `useTable`
+
+- `headerGroups: Array<HeaderGroup>`
   - An array of normalized header groups, each containing a flattened array of final column objects for that row.
+  - See [Header Group Properties](#header-group-properties) for more information
+- `columns: Array<Column>`
+  - A **flat** array of all final column objects computed from the original columns configuration option.
+  - See [Column Properties](#column-properties) for more information
 - `headers[] Array<Column>`
-  - An array of nested final column objects, similar in structure to the original columns configuration option.
+  - A **nested** array of final column objects, similar in structure to the original columns configuration option.
+  - See [Column Properties](#column-properties) for more information
 - `rows: Array<Row>`
-  - An array of rows **materialized** from the original `data` array and `columns` passed into the table options
+  - An array of **materialized row objects** from theriginal `dat oa` array and `columns` passed into the table options
+  - See [Row Properties](#row-properties) for more information
+- `getTableProps: Function(?props)`
+  - **Required**
+  - This function is used to resolve any props needed for your table wrapper.
+  - Custom props may be passed. **NOTE: Custom props will override built-in table props, so be careful!**
+
+### `HeaderGroup` Properties
+
+Header Groups are The following additional properties are available on all `headerGroup`'s, returned by the table instance.
+
+- `headers: Array<Column>`
+  - **Required**
+  - The columns in this header group.
+- `getRowProps: Function(?props)`
+  - **Required**
+  - This function is used to resolve any props needed for this header group's row.
+  - You can use the `getHeaderRowProps` hook to extend its functionality.
+  - Custom props may be passed. **NOTE: Custom props will override built-in table props, so be careful!**
+
+### `Column` Properties
+
+The following properties are available on all columns returned by the table instance.
+
+- `id: String`
+  - The resolved column ID from either the column's `accessor` or the column's hard-coded `id` property
+- `visible: Boolean`
+  - The resolved visible state for the column, derived from the column's `show` property
+- `render: Function(type: String | Function | Component, ?props)`
+  - This function is used to render content in context of a column.
+  - If `type` is a string, will render using the `column[type]` renderer. React Table ships with default `Header` renderers. Other renderers like `Filter` are available via hooks like `useFilters`.
+  - If a function or component is passed instead of a string, it will be be passed the table instance and column model as props and is expected to return any valid JSX.
+- `getHeaderProps: Function(?props)`
+  - **Required**
+  - This function is used to resolve any props needed for this column's header cell.
+  - You can use the `getHeaderProps` hook to extend its functionality.
+  - Custom props may be passed. **NOTE: Custom props will override built-in table props, so be careful!**
+
+### `Row` Properties
+
+The following additional properties are available on all `row`'s, returned by the table instance.
+
+- `cells: Array<Cell>`
+  - An array of `Cell` objects containing properties and functions specific to the row and column it belongs to.
+  - See [Cell Properties](#cell-properties) for more information
+- `values: Object<columnID: any>`
+  - A map of this row's **resolved** values by columnID, eg. `{ firstName: 'Tanner', lastName: 'Linsley' }`
+- `getRowProps: Function(?props)`
+  - **Required**
+  - This function is used to resolve any props needed for this row.
+  - You can use the `getRowProps` hook to extend its functionality.
+  - Custom props may be passed. **NOTE: Custom props will override built-in table props, so be careful!**
+
+### `Cell` Properties
+
+The following additional properties are available on every `Cell` object, returned in an array of `cells` on every row object.
+
+- `column: Column`
+  - The corresponding column object for this cell
+- `row: Row`
+  - The corresponding row object for this cell
+- `value: any`
+  - The **resolved** value for this cell.
+  - By default, this value is displayed on the table via the default `Cell` renderer. To override the way a cell displays
+- `getCellProps: Function(?props)`
+  - **Required**
+  - This function is used to resolve any props needed for this cell.
+  - You can use the `getCellProps` hook to extend its functionality.
+  - Custom props may be passed. **NOTE: Custom props will override built-in table props, so be careful!**
+- `render: Function(type: String | Function | Component, ?props)`
+  - This function is used to render content in context of a cell.
+  - If `type` is a string, will render using the `column[type]` renderer. React Table ships with a default `Cell` renderer. Other renderers like `Aggregated` are available via hooks like `useFilters`.
+  - If a function or component is passed instead of a string, it will be be passed the table instance and cell model as props and is expected to return any valid JSX.
 
 ### Example
 
diff --git a/examples/sorting-with-useSortBy/src/App.js b/examples/sorting-with-useSortBy/src/App.js
index 9e18dc3..96ff1ed 100644
--- a/examples/sorting-with-useSortBy/src/App.js
+++ b/examples/sorting-with-useSortBy/src/App.js
@@ -118,7 +118,7 @@ function App() {
     []
   )
 
-  const data = React.useMemo(() => makeData(100), [])
+  const data = React.useMemo(() => makeData(20), [])
 
   return (
     <Styles>
diff --git a/src/hooks/useColumns.js b/src/hooks/useColumns.js
index a925095..2ae4c3d 100755
--- a/src/hooks/useColumns.js
+++ b/src/hooks/useColumns.js
@@ -23,7 +23,7 @@ function findMaxDepth(columns, depth = 0) {
   }, 0)
 }
 
-function decorateColumn(column, parent) {
+function decorateColumn(column, parent, depth, index) {
   // First check for string accessor
   let { id, accessor, Header } = column
 
@@ -37,20 +37,26 @@ function decorateColumn(column, parent) {
     id = Header
   }
 
+  if (!id && column.columns) {
+    console.error(column)
+    throw new Error('A column ID (or unique "Header" value) is required!')
+  }
+
   if (!id) {
-    // Accessor, but no column id? This is bad.
     console.error(column)
     throw new Error('A column ID (or string accessor) is required!')
   }
 
   column = {
-    Header: '',
-    Cell: cell => cell.value,
+    Header: ({ id }) => id,
+    Cell: ({ value }) => value,
     show: true,
     ...column,
     id,
     accessor,
     parent,
+    depth,
+    index,
   }
 
   return column
@@ -58,8 +64,8 @@ function decorateColumn(column, parent) {
 
 // Build the visible columns, headers and flat column list
 function decorateColumnTree(columns, parent, depth = 0) {
-  return columns.map(column => {
-    column = decorateColumn(column, parent)
+  return columns.map((column, columnIndex) => {
+    column = decorateColumn(column, parent, depth, columnIndex)
     if (column.columns) {
       column.columns = decorateColumnTree(column.columns, column, depth + 1)
     }
diff --git a/src/hooks/useTable.js b/src/hooks/useTable.js
index f779621..4d9c1c5 100755
--- a/src/hooks/useTable.js
+++ b/src/hooks/useTable.js
@@ -1,20 +1,20 @@
 import PropTypes from 'prop-types'
 //
-import { flexRender, applyHooks, applyPropHooks, mergeProps } from '../utils'
+import { applyHooks, applyPropHooks, mergeProps, flexRender } from '../utils'
 
 import { useTableState } from './useTableState'
 import { useColumns } from './useColumns'
 import { useRows } from './useRows'
 
-const renderErr =
-  'You must specify a render "type". This could be "Header", "Filter", or any other custom renderers you have set on your column.'
-
 const propTypes = {
   // General
   data: PropTypes.array.isRequired,
   debug: PropTypes.bool,
 }
 
+const renderErr =
+  'You must specify a valid render component. This could be "column.Cell", "column.Header", "column.Filter", "column.Aggregated" or any other custom renderer component.'
+
 export const useTable = (props, ...plugins) => {
   // Validate props
   PropTypes.checkPropTypes(propTypes, props, 'property', 'useTable')
@@ -85,10 +85,13 @@ export const useTable = (props, ...plugins) => {
   ;[...api.columns, ...api.headers].forEach(column => {
     // Give columns/headers rendering power
     column.render = (type, userProps = {}) => {
-      if (!type) {
+      const Comp = typeof type === 'string' ? column[type] : type
+
+      if (!Comp) {
         throw new Error(renderErr)
       }
-      return flexRender(column[type], {
+
+      return flexRender(Comp, {
         ...api,
         ...column,
         ...userProps,
@@ -190,12 +193,13 @@ export const useTable = (props, ...plugins) => {
 
       // Give each cell a renderer function (supports multiple renderers)
       cell.render = (type, userProps = {}) => {
-        if (!type) {
-          throw new Error(
-            'You must specify a render "type". This could be "Cell", "Header", "Filter", "Aggregated" or any other custom renderers you have set on your column.'
-          )
+        const Comp = typeof type === 'string' ? column[type] : type
+
+        if (!Comp) {
+          throw new Error(renderErr)
         }
-        return flexRender(column[type], {
+
+        return flexRender(Comp, {
           ...api,
           ...cell,
           ...userProps,
@@ -209,8 +213,5 @@ export const useTable = (props, ...plugins) => {
   api.getTableProps = userProps =>
     mergeProps(applyPropHooks(api.hooks.getTableProps, api), userProps)
 
-  api.getRowProps = userProps =>
-    mergeProps(applyPropHooks(api.hooks.getRowProps, undefined, api), userProps)
-
   return api
 }
diff --git a/src/utils.js b/src/utils.js
index daf02df..8a8c1c7 100755
--- a/src/utils.js
+++ b/src/utils.js
@@ -89,12 +89,8 @@ export function getElementDimensions(element) {
 }
 
 export function flexRender(Comp, props) {
-  if (typeof Comp === 'function') {
-    return Object.getPrototypeOf(Comp).isReactComponent ? (
-      <Comp {...props} />
-    ) : (
-      Comp(props)
-    )
+  if (typeof Comp === 'function' || typeof Comp === 'object') {
+    return <Comp {...props} />
   }
   return Comp
 }