I have it and played it. It's a really good game and I enjoyed every bit of the game. Graphics are great, even without a high-end Graphics-card (I have a ATI Radeon X700PRO 256mb). I have mostly been playing the side-quests wich I think are better than the Main-quest, mainly because almost every quest feels different. I am lvl 13 now and played 40 hours and I still have a lot to do.
I don't play it at the moment, for 2 reasons: I got stuck in the main-quest (Not that it is a big problem) and I am focussing myself on Guild Wars, as GW:Factions will be out soon.