I don't really disagree, the movie isn't great shakes but it DOES tell you more about Ra's philosophy and inner style, and it is FUN in a "Reefer Madness" sort of way indeed. And if you are a fan of sort of Zorastrian dualistic thinking this is the best movie of the seventies for that matter.
I'm not saying either that no Arkestrites were toking or poking, BUT this movie was NOT conceived on dope, of that I am pretty sure. The white directors and producers seemed more interested in shooting a pseudoblaxploitation softporn movie, and the "spaced out" elements that may seem to be acid-born pretty much seem to have come from Ra, who was NOT dropping cubes or squares or dots. That's my take on it from viewing and from interviews with Ra's director and producer included on the dvd, and from viewing the "home movies" on there.
I think the bio of Ra is pretty good, but I don't think it's a good introduction to the music or the man; I think the bio is better if you come to it knowing something of Ra and getting a little that you know sort of turned sideways!