I shyed away from memory foam due to the high cost and mixed comments from friends, but I have a brass bed with metal spring insert which will not accept a box spring. This mattress seem to be a perfect solution so I took the gamble. Am I ever glad I did. Covering the springs with plywood made a perfect platform, and I now sleep just so comfortably. The only negative was a slight chemical odor from the foam, but it disappeared within a week. For just a few dollars more than a foam mattress topper, I have the whole thing. Unbelievable.