We can't find a truly firm replacement for a Beauty rest mattress that we bought in 2008. We actually switched our new one out for the old one and put this in a guest bedroom. The lack of firmness is a bit annoying given that it's advertised as firm. It also sinks in way too much causing my wife to roll into the little devit next to us. We love the quality of older Beautyrest mattresses but we're finding it more and more difficult to find high quality pieces that last as long as the older ones we've purchased. This is probably our last Beautyrest purchase.