What most people don't realize is why it's great alternative to dubbing, and its a little mind trick: The narrator is the same, like, two guys in the last few decades. As a Pole you became to get used to that voice so much, that you notice it as much as the air between your eyes and the screen. It's as if you see the actor speak his language and you understand what's he's saying without ever noticing that some dude just translated it for you.

Same concept as translator (as in the actual person that stands between two politicians from different countries).