I purchased the twin size to cover my rock hard XL twin dorm bed. Of course the length is a touch short, but it's made my mattress far more comfortable. As with all memory foam products there is a sort of sweet-chemical when you open the packaging, this scent faded about four days after I opened the plastic-wrap. I put the foam on my bed with the egg-crate side up, it definitely changes the texture of your mattress (I like it, I think it feels like sleeping on clouds, but some people might find the texture odd, fortunately the foam also has a smooth side). I give the product four stars because the glue between the foam and memory foam sections is not particularly strong (you can easily pull the sections apart with your hands), however I haven't had any problems with separation on my bed. All in all I was very pleased with my purchase, I spent the extra $40 or so to by this rather than a thinner foam sheet and I was glad that I made the decision to go with the higher quality/thicker topper.The only downside is that I can't keep my roommates off of my bed now.