Foam Cracked and broken

After a few years of use I started to complain that the support of this mattress was really bad. Today, after about 6 years, we took the mattress covering off and were shocked to find that the foam was broken and cracked (in the octagonal shape of the "springs") exactly where we both slept. Bits of broken foam was pressing through, to the point we had to vaccuum the floor after we moved the thing outside to the dump pile. For such an expensive mattress I would have expected more than a few years out of it and this type of breakdown is unacceptable. Most reviews I see are from people who've only used this mattress for less than a year....just wait and see what happens in 5 years!! Not worth the money unless you are able to shell out a few thousand every few years for a new mattress.