Very happy with this purchase. I recently purchased a brand new mattress that was giving me some pressure-point pain as I am exclusively a side sleeper. I decided to try this gel memory foam topper as I am a hot sleeper and heard that regular memory foam is very hot. The topper arrived quickly and all wrapped up small in a box. It expanded immediately upon removing the plastic wrap and I was so happy that the smell was minimal. I am very sensitive to smells and this was not nearly as bad as I have heard memory foam smelling. I had to get right down next to it to smell it, and it was faint. I left it out overnight and put it on my bed the next day. It fit right to the edge. Note that I spent the extra money on the topper that came with the cover, and that was kind of a waste, because while it fit when I first tried it, I decided to wash it before putting it on the bed to sleep on, and even though I dried on low, it shrunk. It just *barely* fits now, and a seem is up where my feet hit and I can feel it sometimes through my sheets. I had a little aches and pains the first night just because I wasn't used to the foam, but after a few days it was fine. Give yourself a week to get used to it. The foam is nice and cool, doesn't smell (smell was totally gone after 24 hours) and it's easy to flip around (some people say the foam toppers are like quicksand and it's hard to move--not the case with this). I am able to sleep on my sides now without pain in my hips and I love sinking into the bed a little with this topper. Highly recommended!