I purchased this for a different reason than a sofa mattress.  So, my review is not related to that.  I used this mattress as a "bedding" to cushion another memory foam mattress I had.  So, as for comfort, I cannot rate it.  It does serve my purposes, however, as a base for my memory foam.  It however, does not fit a bed frame, as it is made for a sofa.  So,,,, it is, what it is.