I'm working on a visual web testing automation tool Usetrace (http://usetrace.com).

Our QA process is relying on it.

We're:

- automatically checking our most critical features every time our code changes in our QA environment

- monitoring the end user experience on production environment using the same automated tests every minute

- creating and maintaining the tests with our tool

- getting live feedback to our development team's flowdock chat through our own APIs