They are better than pull-outs you find at many hotels but not as good as a bed. Size is fine, queen for the couch, and even the chair can easily hold an adult.
I slept on the chair, DSis slept on the sofabed and we were both fine (and we are both Pooh sized). The 2 kids got the bed because we wanted to be able to close the door and use the living area while they slept. I will say that if you like a soft mattress then the pullouts may not be for you. I like a firmer mattress so they are fine with me.
They are better than pull-outs you find at many hotels but not as good as a bed. Size is fine, queen for the couch, and even the chair can easily hold an adult.