This is the best exercise mat ever. No more pain in my arthritic hips when I have to exercise while lying on my side. Mine didn't have an odor as some reviewers mentioned and the memory foam is perfectly resilient after 2 weeks of daily use. The only issue I had was that it was a little hard on my injured back to roll up when I was finished (I'm not supposed to lean over if I can avoid it). So I just lifted it onto the bed before rolling it up - it's not too heavy to do that easily. Worth every penny!