Having recently lost a parent, I found this film very moving.  It is mature in that it isn't some silly thing about removing the barriers to falling in love - by far the easiest part - but in how to move on after a divorce.  The actors are extremely fine, and their characters evolve throughout the entire film:  the left-over mom is angry, the stepmom is a rather hard-edged career woman, and the kids are expressing pain and hostility in their own way.  Happily, the husband is not a simple jerk, but a guy working very hard to help everyone along the way to whatever comes next.  The way that they all adapt is entirely believable, bringing a realism that you rarely see in love films, and this is surely about love.