I saw this a year ago on my visit in Prague. It had English subtitles, so I understood it pretty well.
First of all, the story was inspiring & interesting. In the end the whole thing unfolds and things aren't as they seemed in the beginning. Brilliant. I love to dialogue between the two main characters. It was pretty funny. Their drugged up moments were interesting, the way they tried to get to the bottom of Vera's death..
The night life of Prague seemed exciting, if not too involved around drugs. Hehe. In the end, the movie seemed like it was just saying "If you do drugs, this is what will happen!". This was slightly boring, but if you don't consider the message too much, you'll get an interesting story with fascinating characters and some funny dialogue. If you want to watch a Czech film, watch this one. 8/10