After using our mattress for one year, we recently ordered 3 more. We were completely satisfied with how fast they arrived and how easy they were to put on our beds. We are in our 70's and could never have handled ones bought from a store. We even took two of them upstairs!
I had been fighting lower back problems for a few years, dealing with physical therapy and chiro visits. Now I only see them for carpal tunnel...we both said "huh, imagine that" when he asked the last time when the last time I had back problems. It all ended when I got this new mattress!!