I just got back from seeing it also. TWO THUMBS UP!! I don't care about the technicalities where they got some railroading stuff wrong, because the drama, action, and excitement were just outstanding. Denzel and Captain Kirk (Chris Pine) were outstanding----completely loved the movie. I will see it again for sure.

(One minor technicality that bugged me: After the runaway crashes with the horse trailer, the conductor's side ditch light broke. Throughout the rest of the movie, they kept alternating which ditch light was broken. In some scenes it was the left light, and in other scenes it was the right light....it kept alternating back and forth as to which bulb was broken. But stuff like that happens in all movies if you pay close attention.)