We have Hurston Luxury Firm. It started feeling like a hammock after the first two months. We rotated it once a month, which didn't help. I waited a year and a half to file a warranty and was denied because the measurement of the gullies was 1.5 on one side and the other side was 1.3. Not only does it feel like sleeping on a hammock, but the foam layer is also compressed so much in the dips we feel like the coils are digging in our backs. It's unacceptable to have that problem with a mattress that's less than two years old. The mattress store we bought it from said give it a little more time, and they're sure we'll have a warranty claim soon. We just ordered another mattress from another company and will never buy another Stearns and Foster!