I finally watched "GoodFellas". It's a really good movie. But boy, is it hard to watch.
(also, given that it's based on real events to some extent, it severely tests my empathy and belief in human goodness. With very sparse exceptions, every time a character died, I was profoundly and viscerally disappointed they died quickly and without prolonged suffering, which is not a reaction I'm proud of, even with fictional characters)