For the price, this is an absolutely great mattress. We bought the medium firmness queen size. I have chronic back problems and both my husband and I have arthritis. We LOVE this mattress! The only issue is how high it is. It definitely needs those special sheets, I think they are called "deep" sheets. Otherwise, it is comfortable and offers a great night's sleep. Both of our Basset Hounds love it even more than we do!