After having my last child my back has not been the same.  Purchased a new mattress only to hate it, searched and searched for a topper and finally was brave enough to purchase this one. So glad I did, came in a little under a week, took only a few hours to raise up to the 4 inches and I slept on it for the first time last night. Hands down, best sleep i have gotten in months!!!!  Couldnt be happier with this product!