Just watched both seasons and really liked the whole style of the show. I'm not big on the whole subject matter (only roughly knew who Escobar was) , even almost bailed after 20 minutes, the subtitles are always a pain, but the show had an interesting vibe.
The actor playing PE was great - every line he spoke was like the core of the show imo.
I didn't mind the narration at all, thought it actually added to the show, but I really hated the acting of the guy doing the narrating (Steve) the more the show went on. He just seemed like a bad actor who overplayed some weird cynical/cool attitude. Also, the entire presence of his wife was pointless to the story - and she was a horrible actress or she got terrible lines. I hated every second between her and Steve.
One question - it seemed to take them forever to find PE once he left his prison, but it felt like his "guys" were all over the city and they could have staked out one place, waited for one of them to surface, and follow him back to PE. One scene they even saw his driver Limon, but went after a "bigger" name. The whole capturing and torturing seemed like the hard way to get to PE.