This thing is so comfortable, such a load off my mind. I'm disabled and I spend most of my time in bed, although I am not paralyzed. I have tried every type of mattress, from the most expensive to the cheapest and everything in between, and could never find one that supported me enough without having pressure points. This is a gentle moving air current that circulates and allows you to just lay there and let it do the work. It feels like a gentle massage. The rubber is very durable seems like it will last a long time and the pump is very quiet running, I can barely hear it. They included a small vinyl repair kit in case of a leak. I bought a $130 spring type mattress on Amazon (after spending $3,000 on a TempurPedic and absolutely hating it). I've set this on top of the cheap but firm mattress, and my body doesn't even come into contact with it anymore. The pump appears to be very well made and it allows you to choose your desired level of firmness from very firm to really rather soft. I have a full size mattress but I just set this on top and although it doesn't stretch the entire width, I really don't need it to. There's enough room left on the mattress for my service dog to lay near me. I really only have one complaint at this point and that is that the air hoses they supply with the pump are not very long and the result is that it's impossible to get the pump controls within easy reach of the patient's hands when they're in bed. A few extra feet of hose and the firmness dial would be right at your fingertips because the pump comes with handy hangers and you can hang it right on your bed frame. I will probably purchase longer air hoses at some point to give me a little more variety without having to get out of bed.I'm so glad I found this! One of the very few pleasures in my life anymore.