Not Great
for a full length documentary, it doesnt really focus on very much about the origins of the gangs, the structure of the gangs, the activities of the gangs, or the community and government responses of the gangs. It mostly looks at a lot of anecdotal evidence, that while likely a major part of the cause, doesnt add a lot to our(rest of America) understanding of the situation.
For a much better take, I would recomend the 20 minute final segment on History Channels "The History of Gangs in America" which is far more informative about the origins of, structure of, and response to the Bloods and Crips than this hour and a half long documentary.