Harvey was great as always, and made it seem like he was actually playing the piano as good as his character was. I loved the character in general and even though I feel like he was little let down by the direction in some parts, I think the character of Johnny Fingers in general is what makes the movie so interesting to watch.
Worth a watch. Even if it might not be exactly what your expecting.
Writer/director James Toback's script is rather erratic, and full of casual plot elements that don't go anywhere (Jimmy's confused sexuality, for one, and how about the traffic accident and the prostate problem?). But the most questionable ingredient is -- surprisingly -- Keitel's performance. He gives Jimmy a ridiculous number of tics and twitches and, strangest of all, decides to compulsively mouth all the notes as he fakes piano virtuosity. Anyone familiar with Glenn Gould or Keith Jarrett can guess how hard this is to watch. Expect some unintentioned laughs before the story inevitably turns violent.