This was an excellent purchase for us with no regrets let me tell you why. I have herniated and degenerating discs in my low back in addition to fibromyalgia and lung problems. I am telling you this for the folks out there that, like me have lung and breathing issues and are VERY sensitive to odors in addition to those other back and fibromyalgia sufferers who do not experience restful sleep. After I opened the box I put my nose in the mattress material expecting it to smell bad, but to my pleasant surprise there was no smell! After carefully unwrapping the miles of plastic wrap we put it on top of our 8 yr. old Chiropratic mattress which we left untouched for about 8-10 hrs. to allow the mattress to inflate after being squashed in the tight shipping box. We made the bed with a good mattress pad and normal bedding and slept like babies. It was very comfortable, feeling like a big gentle body hug and to my surprise supportive to my back. I awoke feeling really rested for the first morning in a very long time. We have used it for many weeks and are just as happy as the first night. It was money well spent. This was our first purchase from Overstock so we were leary about spending the money afraid of being taken, but after I read so many informative reviews from everyone about it we took the chance and are now glad we did.