I have a new gel foam memory mattress and love it, but its a bit too firm for me. I wanted a mattress topper but not one with those egg crate bumps. Found this one and worried about being hot, the smell, and so forth. It came vacuum packed and weighed a ton. dragged it to the bed, unwrapped it and let it unroll. it took less than a day to reach full size. (by the way the full size of 4inches includes the fluffy cover they pack in) it took a couple of days to air out and then I was good to go. 1. I would buy this again. 2. I recommended it a friend and she got one for her and the guest bed in her home. 3. before I replaced my old mattress I should have bought this instead of that pricey one. 4. overstock was great on communication thru email about where the item was and when to expect it. 5. simply cannot beat the price. it was much less than half of what others are selling it for.