I couldn't figure out why I was waking up so tired & my back so sore when my old adjustable mattress was only 5 years old until I slept on our new restonic mattress. After only 3 days sleeping on it, I was feeling less back pain & getting a better night sleep. I love the fact that I can go up at night to read in bed & just elevate my feet and not have something pushing into my back. These mattresses are thicker so we did get through Amazon sheet fasteners, but I am also looking into deep pocket sheets from Macy's.