The topper was delivered in good shape and in a reasonable amount of time. I let it air out and decompress for three days. It never had much of an odor. At best it expanded to 1.75 inches even though it was supposed to expand to two inches. I was expecting vent holes the diameter of a large nail and instead the holes were about twice the diameter of a pencil. I think having larger holes made it lose its memory foam feel and simply feel like a piece of latex foam. It does sleep cooler than memory foam and that is why I bought it. I am rating it down because of the size of the holes and the loss of the memory foam feel. What I was looking for was a cool sleeping memory foam topper.