I just saw this on Hulu of all places for the first time yesterday and I regret not seeing this in theaters since I'm sure the superior soun system in the theater setting would have improved my viewing experience that much more. I'm very skittish on watching movies in general these days, but I'll watch the sequel/prequel/whatever story crops up featuring the Benecio Del Toro storyline.
Sicario did a pitch perfect job keeping me on the edge of my seat since it wasn't clear what in the world was going to happen next. And the nebulous ending was perfectly done as well.
"Sean sparks like John Starks, nah, Sean ball like John Wall" - Rest In Power Forever Sean Price.