Such a blast!
Personally, I wasn't expecting much from 'Bullet Train' at all. The (most overplayed) trailer didn't fill with me with much interest and I thought the bullet train aspect would be gimmicky and perhaps even too limiting. However, to my surprise it's the exact opposite to all that. It's supremely entertaining and very amusing!
I love the whole style of the film, the editing is top notch. the bloody visuals are class and the music is superbly chosen - every track hits. Then you also have an excellent cast. I thought, again based on the trailer(s) that I saw, it would be a run-of-the-mill Brad Pitt feature, but his performance is terrific throughout.
Aaron Taylor-Johnson and Brian Tyree Henry are a quality double act, I thought their accents and dynamic would get tiresome but if anything I enjoyed them the more I saw them - funny guys! Joey King was the only character I wasn't sold on during the film, though by the end I dug her performance too.
Andrew Koji and Hiroyuki Sanada are also very good, while Michael Shannon, Benito A. Martínez Ocasio (aka Bad Bunny) and Zazie Beetz are welcomed cast members as well. There are also a few other noteworthy people involved, including two that Pitt knows well from a different 2022 flick. Seriously, what a cast!
If I had to mention one gripe, it would be the run time/pacing - this is me nit-picking, though at like one or two (no more than that) moments I did feel like it wasn't paced incredibly. Again, no biggie though. All in all, I most definitely had a great time with this and would certainly recommend it.*
*still, if you want an even greater film set entirely on a train then you gotta check out the outstanding 'Source Code' - one of my favourites!