The Aerobed one I have is really comfortable, honest, I have slept on it myself. Normally I hate airbeds (in the camping sense). A lot of different people/couples have slept on it and commented on how comfortable it was. I was also doubtful but now am a believer.
I did have one demonstrated for me in John Lewis, but they only have the more expensive sorts so I didn't buy it from them. Cannot remember whether I actually lay down on it, had the DC rioting around at the time.