This mattress topper has saved my back...& my bank account! While I know I'll need to replace my mattress within the next year or so, this topper has allowed me to put off that big expense for the time being. It's incredibly comfortable & a fantastic price. I'd compared prices at Target, Walmart & dept stores & couldn't find a king topper under $100... Most of them were only 3", too! The only downside is that even my deep pocket fitted sheets aren't deep enough but that's to be expected when you add another 4" to an already thick mattress...& nothing a few sheet keepers can't fix!