I had a Sealy that was almost 30 yrs old and still in good shape, that I kept in the spare bedroom, So I decided to get a new one for myself, and after only 3 days I noticed that it looked to be sagging in the middle of the mattress, and I'm not a big guy 5'-6" about 170 lbs, one person. So I took a picture on day 4 to keep in my phone, so far after almost a month now it seems to be okay, but I am concerned that it will get worse. I hope Sealy will stand behind their product.