Yeah man, I'm hooked. I wish more people on my friend's list had it for the co-op though.
I downloaded it for the PC and am really missing out on the co-op that's there. I'm hooked on this game right now and feel that co-op would just take it over the edge, co-op RPG games are hard to come by these days (reminds me of the good ol' Phantasy Star Online days).
I didn't see much of this game and wasn't thoroughly impressed by what I saw but after I started playing it...I can't stop. I'm surprised at how challenging it is (low lvl going into high lvl areas is fun )