We've had our mattress 7 odd years now. It was very expensive (around 1k) as we wanted a decent one. Since having three kids and two of whom have autism and needed a lot of carrying and picking up off the floor I have a bad back. Every morning I wake up with a sore and aching back. We've come back from our holiday and I didn't have the same back issues as I did here. Dh thinks I'm crazy to want to replace a perfectly good mattress.