I bought it on sunday, much to support Funcom (since I'm norwegian) and because I was reading forums all over the net about how great it was.
Turns out, it's actually quite fun. It's still a MMO, so you run around doing quests and crap. But some of the quests are HARD, and this is in the starting area. I won't spoil anything, but it makes you investigate and not just "run there, grab that, run back". And the atmosphere is GREAT, just stunning.
I really like it, and I had no real thoughts about what kind of game this was before I tried it. I'll continue to play because it has potentional to become something amazing.
Lets hope the end content and everything is good enough to keep players. I played AO for a while, and I had a blast in that game, the fun that game is in TSW as well, so I think they really hit the jackpot here.