I love this mattress! Once we received it....let it expand for 24 hours. There wasn't any odor from the memory foam at all. It is amazing how comfortable it is. I was hesitant to order through the mail but it was such a smooth process. The price is phenomenal & free shipping. I shopped around a lot for memory foam/gel mattresses & couldn't even come close to this price. I love that when my husband rolls over...no movement in the bed. I am sleeping better now than I have in the last 20 years. I highly recommend this mattress. I chose the medium firmness and it is perfect for us.