After one year of use there are significant indentations in the spot where we lay. If I want to roll to the center of the mattress, I have to roll up the hill. I don't think memory mattress means that it remembers where I laid last night. This makes it very uncomfortable. I wake up with a back ache almost every morning. Contacted the company, they replied that, the indentation it is not deep enough. The indentation must be 1 1/4" so I'm waiting for that day, which I'm sure is not far away. Until than I have to sleep on this.