For a rather scary b2p inflatable exerciuse I recommend beam airbeds -- the pocket ones have a distressing habit of tearing through the outer envelope at the pockets under pressure sadly.
Recommend you stand away from the airbed, since the inner baffles failing is
pretty violent - last time I did this with a single Intex the whole damn bed jumped a meter into the air with a loud bang!
It's kind of like getting an extra "pop" per baffle though, very good!