It's a very bursty and unforgiving bracket. BM Hunters, Rogues, Ret Paladins, Enhancement Shamans can dish out a lot of damage in a very short period of time without any effort what-so-ever.
I've only been here for a couple months, I love my Moonkin but there are times I just want to pull my hair out. Enhancement Shamans will kill me in seconds, even in Moonkin form. There's a rogue in my Battle group that will do a Cheap Shot -> dps -> Vanish -> Cheap Shot -> dps -> Kidney Shot rotation, and I'm at less than 30% hp when the kidney wears off and I'm FINALLY not stunned but it's nearly impossible for me to recover from it. This is with Barkskin up and in Moonkin Form.
If you like big crazy friggin' damage and crits, this is the bracket for you.