Cheap, comfy, light and take up hardly any space
I used one of these on a hiking trip. There are a few reviews saying it deflated quickly but mine stayed up for at least 6 hours before having to get up and reinflate. My wife's didn't go down at all. Getting air in is very easy once you get the knack and you can adjust the firmness with extra or less twists of the sealing bands. It packs up tiny and is very light, smaller and lighter and more comfortable than a roll mat. The only down size for me was getting out of it which was a struggle in a two man tent with two of these in, but if you have the room there's no issue at all.