I bought a Sealy Memory Foam last April because an on-line store had a great deal, great price, free shipping, & a good reputation for customer service if there are any problems. Well, I unrolled it * let it take shape for a few hours & put it on the bed. That night felt slightly different, but by the end of the week, Ed & I realized we were sleeping more soundly, less aches, & did not want to get out of bed in the morning! This is the first topper I have bought, & I would strongly recommend! My 13 year old son wants one too because he hears us raving to our friends! Debbie