Fast edits
I have to say I found this film quite disappointing, and would definitely put it amongst Scorsese's weaker films.
Although the cinematography was beautiful throughout, I was often put off by the way it was edited. There seemed to be way too many quick cuts, almost becoming distracting at times. I think that most parts of the film would have been suited to some nice long takes, but instead seemed to be chopped around too much.
It reminded me of a quote I heard once by Werner Herzog, where he said that many short cuts are a clear sign that what is being filmed isn't interesting in itself. Sadly I feel this applies somewhat to this film.