We ordered this, a bit skeptical as to whether a new mattress in a used sofa bed would actually work! Not only does it work but is probably the best sofa bed mattress I have ever used! No worries about whether our guests will be comfortable from now on! The best part is that the sofa bed, while not new, certainly didn't need to be replaced as much as its old mattress. Now, it has a new lease on life! ,