The low point in production values in 1970s film!
The production values are a new low for what could be called a "feature" film. The acting is wooden, the cinematography is piss-poor, and just the first ten minutes tells you all you need to know about this film.
This whole thing is roughly the equivalent of one of the 70s TV miniseries, but not one of the good ones, and with worse acting. The camera work is about half as good as the worst episodes of Starsky and Hutch, but the acting is almost a tie.
This isn't even a B movie. The airplane crash is the most poorly executed sequence in all cinematic history.
You need to see this to understand Scorsese? Yes, if suffering through a horrible film is necessary to know what good films are, then maybe.
I'll tell you this: If you haven't seen this two hour waste of film yet, don't, please just take my word that Scorsese is a truly great director and all of his films---except for this one---are good.