When it’s time, it’s time.  When the sofa is flat, uncomfortable, or just plain peeling, this is a great replacement.  It’s large, wide, deep and yet fits perfect across the back of the RV.  Just because it comes in a box, don’t think of it as a cheap replacement even though it’s half of what typical RV furniture costs.  It’s a great sitter and napper and after using it for over a year, I can honestly say this has been one of those great purchases we have made.