Sofa sleeper couches in general are not very comfortable, either for sleeping or in the couch position itself. In all honesty, if this is going to be your main couch in your living room and it's a room you'll be spending a lot of time in as a family, you're probably much better off getting a couch that is overall a better fit for your needs, especially if you'll be lounging on it every day for the next several years, and getting a queen sized Aerobed for guests. Sleeper sofas suck and are terribly uncomfortable, you get stuck with a bar right across your back and any mattress that is designed to fold up will always be terrible. When I've been stuck with a sleeper sofa, I always pull the mattress off and lay it directly on the floor to sleep. That sucks too, but not as much as having a bar in your back. In the long run, guests will be much more comfortable with an inflatable mattress and nice bedding that actually fits the mattress, and so will you.