Our last LMA mattress only lasted 20 years. We bought our first latex mattress from LMA at Archerfield. We have never turned it or rotated it because it is too heavy. In the last 12 months or so we are noticing there is a bit of a dip in the latex and we have had to purchase a new mattress. No really, we love our LMA mattress and that is why we wouldn’t buy any other.