I am now playing the beta. The catch is I can only play between 9/15 & 9/17. I can only play Bounty Hunter and Imperial Agent from levels 1-7.
I have played it for about 2 hours so far. It is pretty fun, but not completely different from WoW combat so far.
The voice over in quests are pretty awesome. It drags you into the atmosphere of the game a little more.
I am a lvl 4 Bounty Hunter, but I want to give Imperial Agent a try tomorrow.