I don't often give a poor review. Unfortunately, this product's biggest shortfall, the fill-valve, is the reason why. It (the fill-valve) is small, most difficult by which to fill and exhaust air, that the larger air mattress I used previously, proved far and away an easier product to use. This one will test the lung capacity of an Olympic cyclist, and if you're a smoker, or suffer from COPD or any other lung-related woes, this is not the mattress for you. And exhausting this turkey is just as frustrating, as the tiny valve demands constant massaging as you fold and exhaust, fold and exhaust. Bum Safari, man...Cost is not always indicative of a superior product, but there are better alternatives out there for your money. This one should definitely be avoided, in my (seasoned) opinion...