Search and read. We've discussed how good it is. Heck, it's answered in the FAQ.
Question... what do you guys really feel about the 2pc T9. Its a 2% per tic from what I understand that it will proc. Myself and a friend tested some things out on a training dummy and found that it hardly goes off. I myself think that blizz needs to buff it up some. As it is now, it really is not that great of a 2pc bonus.