I bought this mattress topper for my BF for Christmas. He absolutely loves it and tells me he doesn't want to get out of bed. Now with the negative: The topper isn't a 3.5". I think they are including that the cover is suppose to add some inches to the topper but it doesn't really. I would say that the memory foam is 2" and the cover doesn't add really anything to it but a good protective cover for the foam.