Hi - 4 hours was about the right amount, in retrospect. The group classes seemed to fly by. I also took 2 hours of private in the afternoon... that made for a very intense and long day! I didn't participate in any of the activities, but did watch one of the dance sessions. It looked like everyone was having fun. If I go back to PdC for another session, I would probably try Playlingua, just for something different and since it's well regarded here on the Playa.info forum. Hope this helps!