I watched Bob Marley: One Love the other night. I thought it was well done. But admittedly, it was a real struggle to figure out WTF they were saying most of the time. I turned on subtitles, but that didn't really help much either. The subtitles were the same Jamaican slang they were speaking, so you'd end up with subtitles like "Ja Mon, I and I fi gon down ta store."
But the story was cool, and it was well done other than the difficulty understanding the dialect.