I would like to hear from people that have done the foam under there ultra frame. Last year I thought about doing it, but after buying the pool and upgrading the pump and filter I couln't justify spending $200 on foam. The season is almost time to start for me, and once again I am thinking about doing the foam. If you mainly do it for comfort on the bottom of the pool, I can't see spending all that money for that. Last year I did 2 heavy duty tarps under pool, and 5/8 decking boards cut into blocks under legs and everything was great. Of course all that was after me spending 3 weekends preparing the level ground. I'm on a budget as most of us these days and if I can justify the foam under the pool, I'll spend it. but if its just one of those hey why not add foam under the pool, and it feels great on your feet when your walking around, Than I can't justify spending the $200.