After reading many of the reviews I decided to give this mattress topper a try. I am so happy I did! I have not been able to sleep on my left side for more than 30 mins due to hip pain. The first night I slept on this foam topper I was able to lay on my left side again pain free! It has helped my husbands hip as well. Don't get me wrong, it will not cure your arthritis..we still have pain during the day after walking or exercise. But we are getting a GOOD nights sleep because of this memory foam. It did have a slight smell when it arrived but we unrolled it and allowed it to expand all day. After putting on a mattress cover and sheet we slept on it the very first night, it was wonderful!