I had the misfortune of buying a beautyrest mattress three years ago. after 7 months it showed signed of coil damage. the company came and said my bed was insufficiently supported even though I had the bed for over 20 years  with no problem from my old beautyrest.  i bought this topper because I was getting back aches.   well I love it.  it is doing the trick of evening my sleeping area.  it does have a slight odor and I put a fan on in my room the first night I used it.  after that it was fine.  i covered it with my down mattress pad and it still allowed my sheets to be tucked in and they even fit better.