Sound Euphonium 3 is simply one of the best conclusions to a show I've seen.
It's not everyday you see the concept of concert band in an anime. In fact, the music genre is really rare let alone a concert band.
Like past seasons, the animation is peak quality and the story is written really well. The drama that occurs during Kumiko's third and last year in high school makes me want to continue watching. However, the introduction of Mayu Kuroe to the series degrade my enjoyment of the show. But overall, I love the entire Sound Euphonium series and I believe anyone who is willing to deal with some drama and competition involved would enjoy this series as much as I do.
10/10