After reading some of the reviews for this bed I was skeptical about buying it, but very glad I did.  I bought an 8" mattress for the trundle and haven't had any problems with it.  My husband put it together in a little less than 2 hours.  It did have a very strong smell the first night as other people mentioned as well.  So we opened the windows, ran a fan, let the mattresses pop up to normal and then slept on the bed two days later and could barely smell anything.