I've got to be honest here: I pretty much liked this movie before I even saw one frame. I love both "Dolemite" and movies about making movies. Combine that with an Eddie Murphy who actually gives a damn and you can't really do much wrong anymore.
It's sad how the real Rudy Ray Moore never got to see this movie, because it's a great portrayal of what made him so endearing and likeable. Moore just never gave up and became a household name (well, a cult figure at least) against all odds. His movies just ooze a genuine love for film-making. "Dolemite" wasn't good on a technical level and the plot made no sense, but it gave the audience exactly what it wanted. Even decades later, it's one of the most genuinely entertaining movies ever made, without ever being in the same ballpark as competent. The boom mic is pretty much a supporting character, but that's all part of the charm.
This movie was written by Scott Alexander and Larry Karaszewski, who also wrote the biopics about Ed Wood and Andy Kaufman (and also... "Problem Child"?). They clearly know what they're doing and get their facts right, but it's the performances that really elevate this movie. It's not only Murphy. Wesley Snipes actually seems to be enjoying himself for the first time in years and steals every scene he's in. The cast gels together very well and all give believable performances.
The only small downside is that the movie pretty much ends at the premiere of "Dolemite". Granted, that's a great climax for this movie, but there's so much more to the life of Rudy Ray Moore. He was actually quite successful for a couple of years after that, before losing everything on the commercial flop "Disco Godfather". Throughout the 1980s he pretty much disappeared, but his career had a revival when rappers started mentioning him as a great influence. Dolemite actually made a comeback in the early 2000s with "The Return Of Dolemite". It's a chapter worth exploring, but with so much source material I understand you have to make a selection.
This movie has certainly revived Eddie Murphy's career, but more importantly it did the same for Rudy Ray Moore. Obviously, he's not around to enjoy it, but the Dolemite character is alive and well after more than four decades. Not bad at all for a movie that everybody tried to talk him out of. Rudy Ray Moore's story is an inspiration to all of us.