Ive waited a few weeks to write this review as I wanted the mattress to settle properly first. It arrived with a black mark on it, but is unnoticeable when on the bed. It did smell chemically at first, so I left it to settle on the bed for a couple of days, with a window open. Once it settled it has no aroma. I have a bad back so chose this mattress for the firmness. I find it almost too firm. If I lay on my side, I get a dead leg after a while. I havent the time or energy to send it back (I work nights so day time is for sleeping). So I have to now search for a memory foam mattress Topper to try and make it more comfortable. If you like laying on a concrete floor and lay on your back all the time, then you will get on with this mattress.