As a guest, would you prefer to have a queen-size bed or a sofa bed in your room?
-Think about when you are not sleeping. Would you want the ability to fold up the sofa bed to make a couch to sit on when you are awake, or do you think that's too much of a pain to pull out your bed and put it back each day?
Personally, I would avoid listings with sofa beds - I've never encountered one that was actually comfortable. And when I'm traveling, I'm spending very little time in the house/hotel during the day when someone would supposedly want to sit down on a sofa. My vote is definitely for an actual bed.
A bed, for sure! Not only are they uncomfortable, but having to deal with the linens every time you open and close the bed/couch will be a pain. Guests can use the living room if they want to sit in a comfortable chair.
bed ... for bedroom or studio apartment. But it is better to have 2 single beds than 1 double because you can host friends and colleagues too. And for couples you can always join 2 beds together.