I prefer the double, but sleep great in the singles too. I like the double in large part because it allows Genuine Draft and I to snuggle up all nice and comfy. She was adamantly opposed to the singles until she spend some time in one. Now, I think she prefers the singles; although, she is pretty short and tends to sleep down the center anyway. If you're a diagonal sleeper, I'd say go with the double. If you sleep down the middle, go with the single. Or, just get one (or two
) of each.