Such a fantastic movie!! It is a continuation of the series, so watch the series first on Netflix or Crunchyroll. If you watch it without context, you might not appreciate it as much. It also makes sense that some peeps found it confusing, so again, watch the series first!!
The story plot is strong, deeper character development, and beautiful animation. It was a tear jerker for me, so bring some Kleenex just in case. There were some brutal moments that Tanjiro had to endure (no spoilers), but this is no surprise considering the series has had these intense traumatic moments (refer to episode 1 - “Cruelty”).
Overall, highly recommend and would give this movie 10/10. Ive already watch it twice, and got another ticket to watch it a third time this weekend haha