Mattress was great the first month than slowly began sinking in and becoming very lumpy- in the winter it's hard as a rock- the summer it's too soft - there is no in between - I have taken to sleeping on my couch most nights because I cannot get a decent night sleep on this mattress - and it has aggravated my back condition even more - which was the original reason I changed the mattress - like everything you live and learn - unfortunately I can't buy a new mattress right now and have to deal with this one but it's probably best to stay away from this mattress if you have back issues
Over the last 6 years I have purchased 5 queen size mattresses for our properties. These mattress are a great value and I recommend them all the time. Our first purchase was for our master bedroom and it is as good as new 6 years later. Firmness has not decrease over time and daily use. Our guest rooms have them and all of our guests rave about how well they sleep on these mattresses. If you live in a cold climate please note that the mattress will be very hard when you first get into bed but softens immediately. This came as a surprise when we purchased this mattress for a ski house. We call the bed "the brick" but within minutes of body heat the bed is perfect. In warmer climates I would recommend the gel-top mattress which will help regulate body heat.