This topper transformed our extra-firm guest bed into a comfortable cloud! The three inches of foam provides the perfect amount of plushness. The topper did smell quite strongly when I first opened it up. Other reviewers said the smell went away in a day but I had to leave it outside five days before the smell dissipated enough. Even then it still smelled a little so I left the topper on top of the bed for a couple days before making up the bed. But now that the breaking in is done, I’m completely happy with this mattress topper. I know my guests will love it too! And it’s way cheaper than buying a new mattress!