The medium mattress seems perfect for someone who likes a slightly firm mattress. There was absolutely no smell to the mattress (I am sensitive to smells). Although there are not many negative reviews for the mattress, I have a hard time believing some of them. For the price you can't go wrong trying it. My only issues don't deal directly with the mattress or are not a big deal. Shipping took 11 days to come less than 1000 miles. I was really hoping for a fast shipment like I read from so many others. My mattress actually measures 10 & 1/4 inches----not 11 inches. Neither of these are not worth deducting a star for. Overall, one of my better purchases------especially for the price. Low risk (price) for high reward (new comfortable mattress--good sleep).