The movie is the best in the Index series, but that isn't saying much. Animation is improved, but it still bears all the sins of the series: Constant exposition, convoluted plot, and the same tired ecchi jokes. It also ignores the ending of Index II despite taking place right after it.
Demon Slayer the Movie: Mugen Train
As the record holder for best box office performance in Japan and #1 Foreign-language film in the U.S., Mugen Train is a fantastic canon movie that sets itself as the pinnacle of what an anime movie of a series should be.
Violet Evergarden: The Movie
The Violet Evergarden Movie is a crowning end to the series. Absolute top quality polish and professional artistry in storytelling, themes, symbolism, and signature KyoAni heart-healing catharsis all abound.
Evangelion: 2.22 You Can (Not) Advance
Now that the Rebuild of Evangelions’s own different story is rolling, the pacing is much more natural and you’ll be on the edge of your seat - or hiding behind it, I literally pulled a muscle in my neck recoiling in horror at the excellently animated action.
No Game No Life: Zero
NGNL Zero is a strong prequel movie with a much heavier and more serious tone than the series. I was caught off guard and cried multiple times throughout. It's worth watching the series for this movie alone.
Flavors of Youth
A beautifully animated coming of age vignette piece with a professional polish, but not very memorable at the end of the day.
Evangelion: 1.11 You Are (Not) Alone
A completely revamped and beautiful beginning to a different Evangelion story. It was so nice to see crisp HD updates and detail, with more focused storytelling with pieces of the fat trimmed out, but this first movie is mostly the same story you know.
The Disappearance of Haruhi Suzumiya
This is the best anime movie from a TV series that I've seen. KyoAni's love for their craft is strongly felt here in a beautiful and emotional piece. All the good of Haruhi improved while trimming all eye-roll moments.
A Whisker Away
A family-friendly Disney/Ghibli vibe that's fun enough, though definitely has "for kids" goofiness in it, but goes a bit deeper emotionally than typical non-Pixar family movies.
Fireworks
An interesting, mysterious story that while gorgeously animated, feels more like a stand-out episode of a Sci-Fi TV series than a standalone movie.