I'm only thinking of bog-standard camping airbeds, so if you've got something else in mind maybe my advice will be wrong. I've used airbeds and I find they actually give me backache if I use them more than one night in a row. They do seem very supportive and comfortable when you first get on them and you're not used to them, but afer the second night I've suffered and I don't think they actually do anything to help you. I suffered from backache in my old 'normal' bed with a 2-year old mattress, but then I found out I'd bought a mattress not suited to my bedstead because it was made to go on an ordinary platform divan. I bought a proper bedstead mattress and I've been much more comfortable: I look forward to going to bed now.