Just watched the first episode last night. Loved it! The locations, the lights and colours of Miami in the late 70's and early 80's. It all looks beautiful! I'm a sucker for a good crime story too.
It looks like a lot of budget went in to this. It looks great. It's hard to tell on one episode about characters/story but it looks very very promising. One gripe I have is the narration.. I kind of ruined it by reading a review and the critic mentioned that the narration often points out the obvious and sort of holds your hand and the critic thought that it's sort of insulting it's audience's intelligence.
That's all I could complain about though.
http://www.imdb.com/title/tt2707408/9.3 on IMDB
http://www.rottentom.../tv/narcos/s01/93%* on Rotten Tomoatoes *Audience Rating