I bought this movie, basically knowing it would be awful and I wasn't disappointed. All the reviewers on here are right (except the two that gave it 5 stars) -it is a horrible movie. BUT, I gave it two stars.
Why, you may ask? Because I read the great book by the same name, and it was very cool to see the scene with actual footage of Spahn ranch. (burned down not long after), and to see the scene with authentic hippies.
The rest of the movie is throw away. If you want a good movie, don't buy this. If you loved the book, or are very interested in the Manson trial/family and want to see footage of Spahn ranch, here it is. Be warned - you'll get five or ten minutes of hippie/Spahn ranch footage.