I have been sleeping on an old memory foam mattress for over 8 years. For the past 2 or 3 I have tossed and turned on end without much sleep. The first night I put this topper on my bed I slept for a solid 8 hours! I am so excited and happy with my purchase. It is like sleeping on a fluffy cloud of wonderful. Slight smell when I first took it out of the box but it dissipated quickly. Highly recommend this!