I found the story compelling and interesting and promising, and the intense premise kept me watching and wanting to know what would happen, but I just found myself disappointed.
Great acting and solid writing, but I was frustrated by the directing to some extent, particularly the poorly filmed or edited fight scenes.
I appreciated the good cop, bad cop theme, but found that just fell apart over the course of the movie. For some reason the focus shifted from the good cop and the person he was protecting, to a long stretch where all we saw was the bad cop and what he was dealing with, even though we lost all sympathy for him by that point and didn't really care to get to know him. That didn't make any sense.
The final moments were certainly a twist, and also didn't make sense. Honestly a lot of build up and suspense for a weak ending.
In all, this movie had promise, but ultimately fails to deliver.