We use these as two singles together as it's wider than our old double airbed. Last week one of the beds gave up and so I've been pondering all week what to do as we're camping again next week. Didn't want to spend £40 on replacing them when I could upgrade to a better airbed such as the aerobed but can't really afford an expensive one at the minute.
Today, I've just bought a cheapy single airbed from Asda for £8 and planned to attach the two singles together somehow and make do. Tomorrow I'll be returning it and picking up the bargain two singles for £7. I'm overjoyed!