Man i love AP. Out of all the sites out there AP as won me the most money and also has the friendliest people. There customer service is also excellent and it takes a very short time period for them to reply ur emails!
IMO, Ap has the best tournament structure. I cant stand those turbo tourneys where the blinds get up so quickly relative to your stack. You cant make a decent pre flop raise in those tourneys without commiting yourself to the pot.