This thing weighs a tonne! The raised gel side does seem to sleep slightly cooler, especially paired with a silky pillowcase. I have severe hot flashes (yay menopause...)(sarcasm there) and have to rotate the pillow about 4 times a night to the cool side. I'd like it much better if it was half the size that it is. I've considered taking an electric knife to it but am afraid of cutting the gel portion and it ALL leaking out. But, all-in-all a good purchase that i'd buy again.