Purchased the Nature's Rest from Sleepy's for ~2K. It had a high rating for being hypoallergenic. My wife and I noticed saging within the first 2 months (my wife and I's combined weight is 325 lbs.). By around the 3 month mark, it had 2+ inch depressions. Replaced it for an 'equal or greater' value product (+ shipping and handling and Sleepy's doesn't give you the replacement boxspring [which voids the warranty on the new matress]). The Stern's and Foster Landmark Select took almost a year to form 1+ inch depressions. The salesman swore that this mattress would stand up. And it did, for an additional 9 months. Bed manufacturers really need to be held accountable for all of the sub-par products on the market; the retailers really need to get rid of commissions and not lie to their customers.