Sensational! Only the second series in subtitles I've ever committed too, the other one is Gomorrah, which is just as good, but completely different and this series is certainly 'different' to anything else I've seen. First class, so many quirky characters that are full of character. One of which is 'Borges' played by 'Claudio Rissi' who seems strangely familiar, he reminds me of Jene Reno (Lèon) at times. He is one of few actors that has made me howl, with just a facial expression, like how Jack Nicholson is able to do so often, in movies like 'As Good As It Gets'. How this guy has got to the age of 67, without being a big, Hollywood, global-type star, can only be down to a language barrier or luck! He'd steal the show, if it wasn't for other great characters that are also in the series, too many to call out, but a particularly quirky one is 'Diosito' played by Nicolas Furtado (looks nothing like Diosito in real life, Google him!) Then there is, cool as you like, 'Antin' played by Gerardo Romano.
I'm an English viewer, I speak no Spanish and I wouldn't change this to English if I could! It's fine as it is. The subtitles were perfect, the script isn't so fast you miss anything in the scenes whilst reading and yet, being on Netflix, if you do miss anything, you can hit the 'skip back 15secs' button and catch it again.