I was leery of ordering a mattress online, and when I saw how cheap this memory foam mattress was, I didn't hardly believe it. My husband and I have wanted to order a tempurpedic for a while but couldn't come up with the $1200+ needed for it. After reading through the reviews, I decided to go ahead and order it. I am SO pleased that I did! This is the most comfortable mattress I've ever felt. I used to wake up every morning with my hips, back and neck hurting (I am young, and I'm not overweight, so I know it was the old mattress giving me problems)... now I wake up feeling great! It fully expanded within 24 hrs and was more comfortable after it was done expanding, but wasn't too bad when it was still in the process of expanding too. Some tips.. I suggest some febreeze to cut the odor, it did have a chemical smell for a few days. Also, I usually use a mattress pad to protect my mattress, but using one on this mattress seemed to lessen the comfort of the mattress, it made it too stiff. Once I took the mattress pad off and just had the fitted sheet on there it was much more comfortable. I have already recommended this mattress to a couple of friends, I am that pleased with it! Buy it, you won't be sorry! It's such a great deal, for a third of the cost of a tempurpedic mattress!