We have always stayed off-site or at value or moderate resorts when we go to Disney, but a friend has offered to rent us points at a good rate and we would like to stay at Animal Kingdom - we love animals! We can only afford a studio and there are four of us (2 adults, 14 year old, 12 year old). Are the sofa beds comfortable? We had a bad experience with a sofa bed on a vacation this summer so I am a little nervous about it!