I'm so impressed with this mattress. The cover's high quality knit, the smell dissipated in 24 hours, it was delivered in 3 days, and it "inflated" to 9 inches high. I have a Min platform bed and it's a perfect fit. I was concerned about the firmness, but you sink into it like wet sand... in a good way. I sleep like a rock, in fact, when I walk in my bedroom and see the bed, I want to take a nap. The only down side to this mattress is the weight, at 55 pounds it's heavy to move. So, put it on the bed before you open the plastic to inflate it!..