This was 15 seconds I couldn't have spent better.
The brisk and fluid animation flew by so quickly it felt like only seconds before the entire anime was over. While I was expecting the Walkman to be in the show, I was not expecting it to be animated with such fidelity and beauty. It really swept me off my feet.
While this is clearly a side-story to the collection of Persona 3 movies, not to mention an anime-only addition, "Persona 3 the Movie Meets Walkman" does a good job expanding on Makoto's character. We have seen him listen to music on an MP3 player since his introduction riding in on a train at the beginning of the first movie and he consistently listens to it throughout each consecutive movie.
Needless to say, it really makes you feel like you're Persona 3: The Movie.