Some hints how to prepare for this film:
To fully understand and to _really_ absorb something of "Chico" you must have as much historical, geopolitical and ideological background-knowledge as you can. Especially about Chile, South America, Allende, Pinochet, communism, fascism, Hungary before and after the '90s, ex-Yogoslavia and the liaison of it's nations, Serbs, Croats, Chetniks, Ustashas, minorities, Albania, Jerusalem etc., just to name some of the most important keywords. (If these terms are not so familiar for you and you haven't seen the film but you want, then I recommend looking after them for a while. Believe me. It will increase your satisfaction!)
To make this mess more "confusing" Chico (Eduardo Rózsa Flores) speaks Spanish(Castilian), Hungarian, English, Italian, Croatian and a little bit of Russian as the story moves along. Because of that, there are almost no people who could fully understand everything without subtitles. This is very interesting and challenging.
See it!
If you liked "Chico", you should also check out: Machuca (2004), Rane (1998), Before the Rain (1994). These films will also improve your understanding of "Chico" and vice versa.