I have had a bad back for years which resulted in spinal fusion surgery. We had 3 different beds in our house and I could not make it through the night on any one of them – it was a Glodilock case of this one is too hard, this one is to soft. So we went to the store and purchased a Rest bed – it was perfect! I find as I am healing my sleeping positions are changing, and with this Rest bed, the mattress changes to meet my needs. We are so thrilled. Now the only bad thing will be when travelling or visiting at other’s homes, we will never be able to get the quality of sleep we have with this bed!