I previously owned a 2 inch topper - different manufacturer. After spending many years on the road, staying in hotel beds, I was happy to be spending every night at my own home. After 5 years, that topper was pretty worn out. So, I decided on a 3 inch topper instead. I'm so thrilled with this choice!! Compared to the ones with the egg crate base, this is foam all three inches through. It is perfectly sized, no smell whatsoever, and unfolded within an hour or so.