It's ok.  But could be better.
For the price, It's too expensive with poor support.  Don't lay on any area but the center of your bed or you'll roll out of bed.  I had it completely inflated and it doesn't support any movement.  So.... I give it 3 stars.  When you slide off the bed more than once in a night,,,,, Your either drunk  or your sleeping on a Mattress Genie.  LOL
Rating: 3 stars