Let's get this out of the way real quick-like: Denzel is fucking brilliant here and I'm not sure how that can be argued against.
As for the rest of this head-scratcher of a film, I don't know what to say.
On one hand, it's an admirable direction to take for Dan Gilroy after striking fire with Nightcrawler in his directorial debut, but the film flounders around in its final act to almost nose-dive proportions that it becomes hard to stay on board.
Also: this is really all supposed to take place within a 3-week span? No. Just STOP IT.