I purchased this topper in 2005 and decided to write a review of it today in 2012 because it's time to replace it. Actually, I probably should have replaced it about 18 months ago. However, considering the manufacturers warranty was only for 2 years, I feel I definately got my money's worth. It was originally placed on a mattress that was WAY too firm and it immediately solved the problem and helped me to sleep comfortably yet be supported. It was then moved to a mattress that was over 10 years old, and again, it greatly improved the comfort and support of that mattress. I would estimate the true life of the topper to be about 4 1/2 to 5 years before it begins to really break down. I intended to purchase another but since they are now out of stock, I'm going to have to try another brand. I would recommend it providing the user does not weigh over 200 lbs. If so, you may sink too deep into the foam and find it difficult to turn over during the night. Great topper for the average adult. The only issue I have with it is that, like some other reviewers, I found the dimensions were misrepresented. My mattress measures a true 58 X 78 inches and this topper is short by about 3 inches. Didn't bother me since I am only 5'3". But taller folks might find this an issue.