Love this mattress. I wanted a thicker one, but was not available in the Cal-King. The 8" is working for me. This mattress has made a difference in my sleep. Fall asleep faster, stay asleep alot longer. My back is not in horrible pain in the morning either. I've only had it a couple weeks, and I hope it holds up a long time. But for the price, you can afford to replace 4 times or more, compared to other memory foam beds. There is a slight odor when you get it. I left it for a day, then slept on it. Still some odor for a few days, but gone now. I'd recommend this to friends and family, and already have. A good buy!!! I also appreciated the directions and advise for this mattress that came with it.