When you lay down on this topper, you feel instant relief of pressure in your back. My husband has terrible back problems and slept better than he had in years. Our 2 year old daughter even laid down for a nap and took the longest nap she has as a two year old! I have used other mattress toppers and liked them, but I LOVE this one. 
Also, it doesn't have a strong smell like most. Two thumbs way up.