We purchased this mattress to go on our cal. king waterbed frame with no box-spring. It came double-wrapped in heavy plastic and it was very heavy, we basically drug it into our side door and guided it down the steps to our bedroom downstairs. There, we cut the outer plastic and then unrolled the mattress. Once that was done, we cut the inner plastic and it started raising very quickly. Within a couple of hours it was the full 14". There was no odor like some other memory foam mattresses have. Our previous mattress was an 8" pure memory foam mattress. It was comfortable at first, but it did sleep hot and in the morning after sleeping on it all night long, I could definitely tell that I was bottoming out in certain places, sinking in too much. While the pure memory foam mattress was comfortable, it probably wasn't the greatest for my back, and I did toss and turn quite a bit.
After reading reviews of hybrid mattresses online, I knew I wanted to get one. This mattress does not disappoint. The extremely plush quilted top prevents any hot sleeping issues, and my wife and I no longer have that sinking feeling like on our old mattress. This one feels soft and supportive at the same time. It almost feels like you are being pushed upwards in total comfort rather than sinking down deeper into the mattress.
We also purchased an Exceptional Sheets brand Extra Plush Bamboo Fitted Mattress Topper and some bamboo sheets and overall, this is the greatest bed we have ever had. My wife and I are back/side sleepers and it is comfortable in either position.