I've been playing on Titan some the past week or so. I'm enjoying the 6 person sit 'n gos as opposed to the 9 person ones on AP. I also like the layout of things, and the table/graphics are very nice.
My only real complaint is trying to register for a sit and go, and finding out it's restricted. Wish there was a way to tell which ones are and which ones aren't before you try to register.