This documentary shows excellent archive footage of Jet Li's childhood and teenage performances in martial arts. We also get to see a variety of different kung-fu styles performed by various artists. These parts of the documentary is well worth a look if you're interested in performing martial arts or the history of martial arts.
However, the two narrators, who also show themselves every now and then and try to come up with something witty to say, just sound and look really stupid. Perhaps this is because of the English dubbing, but they really don't add anything to the documentary. They rather decrease the quality instead.
So in conclusion, if you want to see some of the different styles of kung-fu and learn some about the history of it, as well as see some footage of a young Jet Li, then this is a great source to seek out. You'll just have to ignore or fast-forward the parts where the narrators talk...