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We just got off the Constellation with a cabin for 3. We had an inside and the small sofa/chair converted to a bed. We were initially happy that it wasn't a normal third berth that came out of the ceiling but it made it very difficult to get from the bed to the front of the cabin because when opened the sofa bed is right up against the desk chair. We found that if you removed the chair and put it next to the wall you could get past it easier. My daughter said it wasn't particularly comfortable but to be honest not many of the third passenger beds ever have been.