I heard it quite good, didn't get around to trying it just waiting to preorder gw 2
The biggest beef I hear out of non-GW converts (who are usually WoW heads) is that it looks too realistic and not cartoony enough. Not a bad beef to have in my opinion. I find it is a bit "bloomy" but that's most games in the past 3 years; overdosing on bloom effects and too shiny for their own good.
It's pretty fun. I call it the diet MMO. No long hauls from one place to the next, quick max levelling, but tonnes of content to enjoy. It's different. Not what some MMO junkies enjoy, but most of them are brainwashed by WoW or some other game and just don't want to leave it.