Grammar and intro summary

at-a-glance.rst

@@ -1,43 +1,46 @@
 Mink at a Glance
 ================
 
-There's huge number of browser emulators out there, like `Goutte`_, `Selenium`_,
-`Sahi`_ and others. They all do the same job, but do it very differently.
-They behave differently and have very different API's. But, what's more important,
-there is actually 2 completely different types of browser emulators out there:
+Mink provides you with a consistent API that can be used with multiple browser
+testing suites in order to choose the best tool for the task at hand - without
+rewriting your tests.
+
+There's a huge number of browser emulators out there, like `Goutte`_, `Selenium`_,
+`Sahi`_ and others. They all do a similar job, but approach the problem differently
+and have very different APIs. There are two main types of browser emulators out there:
 
 * Headless browser emulators
 * Browser controllers
 
-First type browser emulators are simple pure HTTP specification implementations, like
+The first, browser emulators, are pure HTTP specification implementations like
 `Goutte`_. Those browser emulators send a real HTTP requests against an application
 and parse the response content. They are very simple to run and configure,
 because this type of emulators can be written in any available programming
-language and can be run through console on servers without GUI. Headless
-emulators have both advantages and disadvantages. Advantages are simplicity,
-speed and ability to run it without the need of a real browser. But this
-type of browsers has one big disadvantage, they have no JS/AJAX support.
+language and can be run in the console on servers without a GUI. Headless
+emulators have both advantages and disadvantages. The advantages are simplicity,
+speed and ability to run it without the need of a real browser. But, this
+type of emulator has one big disadvantage. They have no JavaScript/AJAX support.
 So, you can't test your rich GUI web applications with headless browsers.
 
-Second browser emulators type are browser controllers. Those emulators aim
-to control the real browser. That's right, a program to control another program.
-Browser controllers simulate user interactions on browser and are able to
-retrieve actual information from current browser page. `Selenium`_ and `Sahi`_
+The second type of browser emulators are browser controllers. These emulators aim
+to control a real browser. That's right, a program to control another program.
+Browser controllers simulate user interactions in browser and are able to
+retrieve actual information from the current browser page. `Selenium`_ and `Sahi`_
 are the two most famous browser controllers. The main advantage of browser
-controllers usage is the support for JS/AJAX interactions on page. The disadvantage
-is that such browser emulators require the installed browser, extra configuration
-and are usually much slower than headless counterparts.
+controllers is the support for JavaScipt/AJAX interactions on a page. The disadvantage
+is that such browser emulators require an installed browser as well as extra configuration
+and are usually much slower than their headless counterparts.
 
 So, the easy answer is to choose the best emulator for your project and use
-its API for testing. But as we've already seen, both browser emulator types have both
-advantages and disadvantages. If you choose headless browser emulator, you
-will not be able to test your JS/AJAX pages. And if you choose browser controller,
-your overall test suite will become very slow at some point. So, in real
+its API for testing. However, as we've already seen, both types have 
+advantages and disadvantages. If you choose a headless browser emulator, you
+will not be able to test your JavaScript/AJAX pages. And if you choose a browser controller,
+your overall test suite will become very slow at some point. So, in the real
 world we should use both! And that's why you need a **Mink**.
 
 **Mink** removes API differences between different browser emulators providing
 different drivers (read in :doc:`/guides/drivers` chapter) for every browser
-emulator and providing you with the easy way to control the browser (:doc:`/guides/session`),
+emulator and providing you with an easy way to control the browser (:doc:`/guides/session`),
 traverse pages (:doc:`/guides/traversing-pages`), manipulate page elements
 (:doc:`/guides/manipulating-pages`) or interact with them (:doc:`/guides/interacting-with-pages`).