I have been sleeping on a pull out couch for awhile now and I needed a new mattress. I bought the cool gel memory foam sofa bed mattress and so far it has been comfortable.  It was a good price and shipped promptly. I will check back in a few months and I hope to have another positive feedback.  

Pros: arrived promptly, comfortable
Cons: No info on how long to keep it wrapped in the plastic, and how long it will take to get to its full size.