Poor quality

We bought this mattress in December of 2007 for $1549 and had it delivered. Upon its arrival a strong chemical smell saturated the bedroom lasting several days. The mattress was fine at first. I liked the low motion transfer design. I could hardly feel my spouse come to bed and he could hardly feel my flipping. However, after about a year dips began to appear where each of us sleep and they've just continued to get worse. We are not heavy people (he weighs 170 lbs and I'm 120 lbs). After another year or so one side of the bed broke down toward the middle (where you would sit on the edge of the bed) and now has no shape or support. In fact the whole mattress feels like it sags in that one direction now. We have purchased a futon and will be freeing ourselves of this expensive, uncomfortable, off-gassing thing.