I ordered this to place over my pillowtop mattress that started sagging in many areas. I'm not ready to purchase a new mattress, and this was a good option until I buy a new one. I had no problem with a smell or odor from this product once unpackaged, and I let it open up and air out for a few days prior to placing on my bed. Since it's been on my bed, it's been good. I've had it on for approximately one month already, and it has retained it's shape and the memory foam seems to be keeping it's elasticity. However, my only complaint is that edges that surround the bed are a bit higher than the rest of the foam pad, mainly because of the fact that the ends of the bednever have any weight put on them. Overall, this was a good replacement until I decide to purchase a new mattress. Happy sleeping!!!