This was the best purchase ever! I am a teacher and for some reason have been sleeping on the floor and never bothered to get a mattress. I always used pillows and adjusted them regularly. Last night I slept on the fold up mattress for the 1st time. My stiff neck that I would wake up with EVERY Morning miraculously disappeared. This mattress is so comfortable and it molds to my back just right. I am currently building a storage box for the mattress to fit in and am so excited about using it. This purchase was money well spent.

Update 8/26/18:
It is still very comfy!!!! If I sleep on it for long hours... past 10hrs - it kinda sinks (where my buttocks is) and I feel the hard floor. I am using this unit every day.