The mattress came quickly, and was easy to set free from it's air compressed package.  It is a little misshapen, and didn't fit the frame very well.  Hmm.  I have not slept on it, because it is for a guest coming for christmas.  Guess we will see what they think of it.  Well, 7 months later I am now seeing that I did not submit this review.  I have slept on it and it is comfortable, firm, but not in a nerve pinching sort of way.  
Only downside is the unneveness of the rectangle.