I read numerous reviews prior to my purchase and am happy to say we are very satisfied. Our biggest fear was that the memory foam topper would smell and not fully fit our bed.... When we opened the package and laid it on our King Mattress it only took about 2 minutes to come to full size and shape (near perfection) and had NO odor!! I believe, especially for the price, we purchased the best product on the market. I would highly recommend the 4" 4lb density as I could see with anything less, one might be disappointed. It's not a "life-time" purchase, but sure has given us the best sleep we've had so far.