The first Sicario film was a surprise to me, and I enjoyed it for its slick thrills but also its darkness and twists and turns; like many I looked forward to the sequel - or rather, the next film, since this isn't really a sequel so much as a film with the same characters. The film places the characters into an unofficial war with the cartels where US forces try to engineer wars between the cartels to make them weaken and distract each other. This action is started due to terrorists being brought into the US as part of human smuggling run by the cartels - which gives the film an opening few minutes that matches the first film for impact.
From this very topical and heated place, the film actually plays out a fairly pedestrian plot that gets progressively smaller after a certain point. It delivers quite a few solid and slick sequences along the way, and mostly the impact of these carries the film. It isn't as good as it appears though, and the plotting doesn't really build - and it is disrupted by some very lazy writing where convenience keeps things going, no matter how unlikely it is. Such things do hurt the film, and took me out of the immersion I felt in the first film; in particular the ending I thought was pretty weak as a conclusion to this film, albeit opening it for the third film that we all knew was in the works before this one was even released.
The cast add to the sense of quality, and the performances are suitably tough and committed. The production standards are high, and it is easy to see the money and effort up there. It is just a shame that at its core, the writing is not as tough and engaging as everything else would have you believe. Still a solidly tense affair that is too slick to not be worth a look, but not as good as it seems.