Big Disappointment!

We bought this mattress September of 2008.  It was less than a year old and we were waking up sore.   Indentations were already forming in the bed.   We bought a memory foam topper which improved the comfort.  But the ridge in the middle of the bed was magnified by the topper making it into a mini mountain.  You literally felt as if you were rolling up and over a mountain to get to the other side.  Unfortunately, the memory foam proved to hot to sleep on so off it came.  Despite constant turning of the mattress, the indentations grew (I'm 110 lbs) and so did the mountain in the middle.   I wake up stiff and sore most mornings.  Based on other reviews I'm not going to try and invoke the warranty.  We'll be buying a different mattress soon.  Don't waste your money, by another brand.