we have only had it for a couple of weeks; I hope it holds up as well as it is now. It is firm yet comfortable and the size is great, the density feels very sturdy; certainly wroth the money. So far we really like it (and we had a Temperpedic prior to this mattress).
Still in new stages. Not sure yet how we like it. Hips a little stiff on awakening. Can’t sleep on back with knees bent as feet slide. But is better then what we had! We have until July to make finale decision.