My king size is 4 years old and I am a BIG man. 420 when I bought it... Now down to 240.
It shows NO signs of wear. No sagging, depressions, bunching, lumps or anything and I do the routine maintenance (turn it whenever I remember to), and it has performed magnificently!
No squeaks! No noise whatsoever!
The bamboo cover is as clean and fresh as the day I placed it, not a stitch has come undone and I consider this to be the best investment I ever made for sleep, health, complete loss of back and neck pain and life itself.
FIVE STARS! WILL BUY AGAIN!
Great company to do business with, as well. (Thanks, Ken! You sold my Mom for her posturepedic frame!)