My family has had Tempur mattresses for over 20 years now. When I moved out I got the ProBreeze and it felt really great for my back, I have quite an arch and I do need good bakc support. I tested all the mattresses in store and decided for this. Now Im quite disappointed because It´s been only 2 years and now my sleep is really bad, it feels so soft, like you sit and you can tell how it sinks. This is not supposed to happen in a 2 year old mattress, and of course the guaranty doesn´t cover how it "feels" so you are stuck with a very expensive pain in the back mattress :( -I got the king size for my husband and I and another one for my son, queen size. When I sleep with my kid I sleep sooo good, but mine has gotten horribly soft, and got both almost at the same time, so I know mine is the defective one but how to prove that to the brand? imposible.