The last 2.5 years have been down hill from there!.... literally. The depressions in the bed on both my wife's side as well as mine are 2+ inches deep. We had a mattress specialist come measure and take pictures. I'm 175 lbs... an average sized person... My wife is also average sized person. The ridge running down the middle of the bed was enormous! We rotated the mattress regularly, the support structure is what Serta gave us... unforutunately, I have not had a good night sleep in years. My wife and I both seek out the living room couch rather than spend a night on a Serta Perfect Day. I would rate it a "Do Not Buy" for certain.