Technically, it's a masterpiece. The score, cinematography, and sound design were amazing. The best shot to me was a scene where the Mexican cop is driving towards away towards a storm in the distance. The shot I described seems so cliche, but Deakins films it in a way that adds a sense of real drama to the movie.
The story was well-written and had a couple of noteworthy lines of dialogue.
The only issue had was the lack of drama between the characters as it relates to how immersed into the CIA's ways both Kate and her partner were. I guess I needed someone to spell it all out for me, but this movie, by design according to the reviews, didn't want to have the CIA's motives out in the open.