Being able to test on Windows without a VM has been a life saver.
We've had issues with IE (of course) and being able to run my selenium tests without needing to set up a virtual machine has not only made my day a lot better, but the whole process was stupidly simple.
Improvements to My Organization:
We've been able to reduce the number of applications running on our server, and therefore reduce the processor costs.
Room for Improvement:
Honestly, I can't really think of anything. It's been a joy to use and so incredibly simple.
Hands down, would recommend.