Bought this for my 10 year old daughter who has just moved from a cabin bed. She falls out of her bed maybe 4 nights out of 7, not sure if its because she is used to having sides on her bed or because the mattress just seems to give way when you lie on the edge, just hope she gets used to it soon! Had to wait a long time for this to be delivered but after a quick phone call another mattress was ordered as original order seemed to have disappeared, however another week of waiting was not ideal as my daughter was sleeping on a blow up bed on the floor. After all this, she does say its the comfiest she has ever been in her bed.