This is one of the best MMO's out in my opinion. Everyone cooperates, very few trolls in game, trading post works great, and some of the recent mini content they put out is very fun. I really have no complaints and have bought about $35 of gems at this point.
Oh, and I've gotten 2 friends addicted as well.
As far as "who is still playing", the server I'm on (dragonbrand) is pretty busy 24/7 and jam packed on the weekends.