I got my Airex pad yesterday and tried doing Meta Toning. It was GREAT. I love it. Thanks to the OP for starting this thread. I yet have to try with p57 but so far I really love it. The xl large is long enough to fit my kness and wrists. Now, if I can only make my 15 month old STOP scratching the surface of the pad and/or getting under me when am on all fours, it would make my workout more enjoyable