Not what I expected...
I really wanted the Slumber Solutions mattress that the King had over 1200 good reviews but their Cal King did not have the same outstanding Specifications so I bought this one instead based on only 50+ good reviews. First, ordering and delivery was spot on. I let expand and air out for a few days as was suggested. I got rid of my old foam memory mattress because of waking up with severe lower back pain as a result of many years of use. This mattress is NOT that firm, I am disappointed. Though I am not waking up with severe pain I do find myself adjusting myself throughout the night when I feel the lower back starting to ache. For edge huggers like myself, unlike my last memory foam mattress this one does not have a solid edge. The support begins a few inches in but not too bad. If there was an easy way to return it I would based primarily on it not being firm enough. It's only been a week but I see myself replacing if I start to wake up with lower back issues. Though I bought my last mattress 10 years ago online as well, without trying out, it turned out to be GREAT for 9 years... this one is a disappointment for me. If you suffer from lower back pain and need a firm mattress this one is not for you. But, if you don't... this is a good mattress otherwise.