Prefer React.createClass over react-mixin

Author: taion

docs/guides/advanced/ConfirmingNavigation.md

@@ -26,20 +26,7 @@ const Home = React.createClass({
 })
 ```
 
-If you are using ES6 classes for your components, you can use [react-mixin](https://github.com/brigand/react-mixin) to add the `Lifecycle` mixin to your component.
-
-```js
-import reactMixin from 'react-mixin'
-import { Lifecycle } from 'react-router'
-
-class Foo extends Component { /* ... */ }
-reactMixin(Foo.prototype, Lifecycle)
-
-// or
-
-@reactMixin.decorate(Lifecycle)
-class Bar extends Component { /* ... */ }
-```
+If you are using ES6 classes for your components, you can use [react-mixin](https://github.com/brigand/react-mixin) to add the `Lifecycle` mixin to your component, but we recommend using `React.createClass` for components that to set up router lifecycle hooks.
 
 If you need a [`routerWillLeave`](/docs/API.md#routerwillleavenextlocation) hook in a deeply nested component, simply use the [`RouteContext`](/docs/API.md#routecontext-mixin) mixin in your [route component](/docs/Glossary.md#routecomponent) to put the `route` in context.