Hi-Fi Rush is just a blast from start to finish. The characters are fun and interesting, the writing is great with fantastic comedic timing in the dialogue and physical humor, the combat is really fun and the music is good too.

The only reason it's not getting 5 stars is because
1) I found that the music was a little too similar from one level to another. While I enjoyed all of the music, I think the very fact that it's a rhythm game kind of locked them in to featuring heavy beat, high energy music, and I did get a little tired of hearing the same stuff over and over.
2) As I got better at the timing I, of course, felt more satisfied with my performance, but also started to get a little bored of the combat. At the start combat was challenging because I was learning how to make sure that my rhythm was on beat and it took time to learn how many beats different attacks take to execute, but by the end of the game I was able to intuitively dodge or counter incoming attacks without much thought. This is a very cool and incredibly apparent indication that I was learning and improving and that the game mechanics are solid, but unfortunately it translated to slightly monotonous battles near the end.

I absolutely loved my experience with Hi-Fi Rush even with the two complaints above. There were some truly epic moments!