I saw it a few weeks ago and was pretty disappointed with it overall, though I was interested in the story. The man left quite a mark on American music of the time. I listen to that solo album (with a young Gary Burton and Joe Morello) a good bit.
Usually I love musical biopics, even the really cheesy ones (there are many of those), but for some reason this one didn't click with me. As they say, YMMV.