With my mother being a huge fan of Parchis back in the day (she had a crush on Tino like most girls at that time in Mexico) and me personally interested in the story of this group, if found this to be a pretty enjoyable documentary.
Outside of some clever editing and the "photo album" bits, the presentation was nothing to rave about and standard, although well made. The music (outside of Parchis's own songs) was good, although again not amaizing.
And overall they did a pretty good job of getting you in the context of these people's lives and the world at that time and place. The whole "legal and money issues" part of the film was a bit confusing but i assume that's because the whole situation was also confusing and a complete mess.
I wouldn't say this is a great documentary or anything, as most of the entertainment comes from this crazy story of a bunch of kids and business men surrounded by unexpected and gigantic success. The honesty of all the interviews really does make this worth while, however, and if you're the least bit interesting in this, you won't be disappointed.