I actually thought this was going to be a silly comedy, so I was quite surprised (not necessarily pleasantly, but still), when I started watching it and it turned out to be a serious movie. Acting isn't that bad either. And while I neither have a beef or any other sort of involvement in the Bushido/Sido war going on, I have to admit, this one is far better than "Zeiten ändern Dich" (german title of the movie), which wasn't really good.
Of course the director on this also did Chico, so you can expect something good. Or should in any case. The story might take expected turns and it might be a bit predictable here and there, but it still is really good. There are some laugh-out loud moments in there too, so the comedy aspect of the movie does work (though again not really in a silly way). I wouldn't really compare it with 8 Mile though (something the other reviewer did, only thing I disagree with), because this is much lighter than the Eminem movie.