I've been playing it. It's awesome!
It has a lot of the good stuff of WoW without a lot of the crap. What I like most about is how i can jump in, get in a party in no time (since parties are pretty much public), and have a meaningful experience in a half hour. A bunch of my friends from the office are playing.
The head start for us started yesterday so after work at like 10PM we all played and talked on skype
got to rank 7 whoo!
I'm really really enjoying it.