we bought a BR rosalyn last december and needed a replacement in january from sagging!  the mattress was very comfortable BUT after just a few months sags and my side of the bed is so hard, my hip hurts when i sleep on my side and my back hurts in the morning.  we have called the company and they will hopefully replace it (again).  it is good to know that others are having the same problem!

this is very dissapointing quality for a top-of-the-line sleep product.