On its own it's definitely worth a watch. I was very entertained by it. I love it when Pitt is just clearly enjoying himself in a movie. He has some movies where you can tell he's going hard for the Oscars or critical acclaim and then he has movies like Bullet Train and the Ocean's trilogy where he just looks like he's having a ball making the movie

If you like Rian Johnson's last two movies, Knives Out and Glass Onion, go back in his catalog and check out Brick. It's a very very quirky murder mystery that's a pastiche of noir murder mysteries set in a modern day high school setting. Very good, highly recommend.

Not really a murder mystery though is it? More a heist action movie with comedic elements.