Bought three of these mattresses online on Black Friday, wow! What a deal! Hadn't had much experience with memory foam type mattresses, except the impression that they feel too "squishy" for my tastes, so ordered firm. Planning to use one for our bedroom, and two for guest bedrooms. Appreciated that the description mentioned two layers: a cooling gel top and the regular foam below. This is a FIRM mattress, not much "give" at all. Feels great to me, I love a firm, flat mattress. Husband prefers a pillow top, which we've had in the past. So to compromise, I purchased a fluffy down mattress pad locally, so we have the best of all: great price, firm mattress, cushy top. Of the three mattresses we ordered, two inflated within 24 hours but one had a permanent dent along one side. I went online, thinking I would just return it, but cost was over $60, so I ordered a replacement. We are supposed to donate the defective mattress to charity or dispose of it. So as a caution, make sure you really want these mattresses before you order, because returning is expensive. I believe some online "mattress in a box" retailers don't take returns, just give you a refund and ask you to donate the mattress to charity. I have no idea how you would ship back one of these after inflating anyway.