This topper is great for a short term fix. It worked great for the first 6 months but fell short thereafter. Purchased it to replace the pillow top on our air mattress (air mattress was 12 years old). I ripped the old pillow top off of the air mattress and placed this pillow top directly on top of the air mattress. What a charm at first but then after approximately six months I starting to feel a depression on my side our of king size bed (the "w" syndrome) again and was awakened with hip and back pains. I purchased this topper back in June 2008 and wanted to wait a fair amount of time to provide a meaningful review (kick the tires so to speak) as most reviews provided on this site are provided within the first 1-2 months of purchase. Feel the price paid for the topper was fair given the short term fix it provided. I now know its time to replace the existing topper or consider purchasing a new bed (perhaps the latex toppers would last longer??). As for how hot or cold the topper makes you feel toasty warm in the winter and comfortable in summer (with central a/c). I am 5'3" weighing in @ 130lb and sleep predominately on my side and stomach. Hope you find this review helpful.