Bought this because they just dont make mattresses like they used to. My mattress is not quite 2 years old, and I suffer terribly from shoulder, back and neck pain due to my job. This topper is amazing. First night I felt a huge difference. Its very comfy, and supportive. There was no chemical smell. I put it directly under my mattress topper, then just made my bed as usual. I would recommend this memory foam topper. Priced right, and a sleep saver.