I gave 4 stars but in all honesty I do not like memory foam mattresses. I needed a topper to alleviate the hardness of my mattress and I thought 3 inches  of foam would do the trick and there would be minimal sink just cushion.This is not the case. It is the sinking in that is annoying making it difficult to move and I thought with only 3 inches this would not occur but it does.This was for my husband but he feels the same way.This basically addresses my decision never to purchase memory foam mattresses.