Kevin Mears’s review published on Letterboxd :
Worth watching for Tilda Swinton, but the you could say that about pretty much everything she's in.
I tend to struggle with films that have a big world building premise that everything else hinges on, cos I can't quite let go of questions.
Like why is the train going so fast? seems a bit dangerous to me; and if the engine is so great, surely it'd still be great (and more useful when stationary).
Those things aside it was all very nicely put together with solid performances and terrific action set pieces. Sort of fizzled out a bit though.