I had previously purchased a Serta memory form mattress topper which I needed to replace. When I saw the egg carton version, I thought it would be comparable to the former zonal topper I so much enjoyed. This was a mistake! Someone had written an evaluation warning against buying this model, but I thought I would take a chance - how bad could it be? The first Serta topper was so great, I figured this one could only be so bad. First of all - they poorly glued together two pads, one egg crate and a 2 inch plain pad. This does not have the comfort one would expect. It is not worth the cost. Wait until you find what you want, but do not expect any great miracles from this one.