Alright, I've seen much better movies with the similar plot of a washed up old timer musician having his/her second shot at a music career and at life. BUT, this movie stands out from that because of three reasons:
1. It has a great soundtrack. Not many movies today accurately depict the culture from the 1980s and the music on this film is good enough to get you hooked.
2. Acting chemistry is brilliant between Grant and Barrymore. I honestly can't expect more because both actors and the cast just plays out their roles beautifully. The script is also brilliant with timely humor. Plus, I get that this film is one of those romantic comedies but I believe that the characters in this film are so layered and the actors are great in showing how they are all looking for something to ease their pain.
3. Personally, you will relate to this film especially if you're a musician or composer. The scenes of this pair composing music and the theme of getting back on your feet even when everyone has given up on you is what has driven me to love this film as one of my favorites. This film teaches you not to judge someone by their cover.
Other than that, it's hilariously funny.