Simmons Beauty Rest World Class 200

I purchased this mattress Aug. 21, 2005 for $1700.The first 3 yrs were fine. Then we saw the sagging on each side of the bed and the bar in the middle protruding. (This particular bed offers two different options of firmness on each side). Now the sagging is more visible to the eye and the bed is unbearable. I purchased it from Mattress Giant and when contacted showed no interest in assisting. Many issues have arisen and they are not a liable company. I have contacted corporate about the warranty and simmons directly with no results. All I can say is do your home work with the Better Business Bureau before buying a mattress and read all reviews and the FINE print on your invoice before your mattress is delivered. This mattress is truely a peice of crap!!!