I went from an airbed that i slept on for ten years to this - and it took some getting used to. The first night, I sunk into the memory foam, which kind of captures you, and wrenched my neck trying to roll over while half asleep. That took about a week or two to heal. Also, it is firmer than I am used to. The memory foam is very comfortable except on my hips - where I carry more weight. That area of the foam compressed so I was padded by the other foam layers underneath, which felt hard. More getting used to. Air yields. On the up side, because the bed does not yield as much, i can lie on my stomach without becoming convex - nice. After I got used to the new dynamics, I started to like it. I'm not crazy about this bed, but I am satisfied with it. The bed unpacked really well - it took about 4 hours to completely expand because it sat on a cold step (25 deg) after delivery for 4 hours. I was afraid it was going to spring out of the plastic like a huge, dangerous roll of biscuits in a tube, but it didn't happen. Very mellow. Most of the initial chemical smell that others reported left when I pitched the packaging materials. 4 hours later it was odor free enough to sleep on.