It's more a series of interviews than a true documentary but, that quibble aside, it's a great window into a world that really hasn't been well documented otherwise because it happened outside of the main thread of the Internet's evolution. I see one (self-published) book on Amazon about BBSs but there really isn't much out there.
Ah yes, let's get into THAT debate. That's not a quibble - it's barely an opinion.
Come on Jason. With a bigger budget you would probably have done things a bit differently. But as I said, it's a well done (and appreciated) look into a neglected area of computing history. And frankly the interviews are probably the most important thing. I'm not being critical.