This mattress is the bomb! It shipped quick, I took it out of the packaging and put it directly onto my platform bed. It was ready to sleep on that night! There was hardly any smell to it so I promptly made the bed up and tried it out. I had been suffering with my back for a while and had tried every mattress that I could afford, but still had problems with my back until this mattress arrived. It is very firm, soI added my memory foam topper to it the next day and have not had a problem with my back since. My husband says the same thing -"its the bomb" and he's a nurse and has back problems, but not any more! You can't beat the price either!