My wife has had a bad back for years. It's still bad even after surgery. She's been sleep on a regular mattress that even made my back hurt at times, so I knew it couldn't be good for her. She didn't want me to spend the money on one of these, but I'm glad I did. While it hasn't alleviated her pain, it has helped some and she's much more comfortable. It did take her a little while to get used to turning while laying on it, but she's fine with it now. A word of advice: do not buy a memory foam mattress less than 4 inches thick. You'll be wasting your ,money. The 4 inches gives it nice cushioning and support. Anything thinner would be no good, in my opinion. Fast shipping from Overstock. When I opened it from the plastic, there was no smell at all, and the mattress didn't take very long to plump up. Great product!