I wanted to write a review of this mattress for other people such as myself who have never purchased a mattress online. First about me. 5'11" and about 220. So not a small person. I had been needing a new bed for awhile now and had done tons of research. I went to the local mattress stores and tried out several brands and sizes. All of them were 10" or below and most twice the price. However I was hesitant if not downright terrified to spend almost 500.00 online, knowing full well and good that it would be an enormous pain to return the thing once it got here. Plus, having never tried it out I was concerned that it wouldn't have the feel I wanted. But, I read the reviews and pulled the trigger and about 2 weeks later it arrived. I actually slept on it that night. My girlfriends initial response was that it was too hard. She is 5'4' and about 120. Now however she is the one that loves it even more then I do. I will say that as a stomach sleeper I have found that I wake up feeling very stiff at times, but that rolling over I go back to sleep almost immediately and have not woken up with back pain or tossed and turned all night as I had previously. I did get the medium firm and after reading other reviews got the waterproof mattress cover as I want this bed to last. In summation this is the most comfortable bed I have ever slept in. The odor was almost non existent. The set up was easy, but do follow others instructions and open it where you want it at, because it is heavy. So order with confidence. This is a great deal. If you are familiar with memory gel, you will be happy. Don't waste your money on a bed that is half the height and twice the price.