If you go into this cinematic experience expecting another Mugen Train, you will be disappointed. However, none of the marketing materials I saw implied this, so I came into this with my expectations tempered. This movie is advertised as being the final two episodes of the Entertainment District arc and the first episode of the Swordsmith Village arc. And that's exactly what it is, along with some new introductory material at the very beginning. I did dock a couple of stars because I think the episodes should have been edited together more seamlessly, but, as far as I know, that was never implied from the trailers or announcements, so I'm not upset about it. I just think it would have made for an all-around better experience.
However, I thought this film was still great for what it was. I remember watching the final episodes of the Entertainment District arc and thinking, "I wish I could watch this in a theater," so I would have jumped at the chance for that by itself, let alone a preview of the new arc.
So, if you haven't seen the film yet and are expecting another true movie experience like Mugen Train, adjust your expectations. Know that this film is three complete episodes back to back to back, with two of them being already released material. If that makes you not want to watch, then don't! Save your money and wait for the new arc to start streaming in April. But if you just want to experience some of the best action so far in Demon Slayer on the big screen plus an early start to the upcoming arc, then this just might be for you.