i agree, this is perhaps the best recent italian movie and I like it, much more than Arrivederci amore ciao that is another recent celebrate italian crime movie
perhaps you just know this movie belongs from a book, called also Romanzo criminale, written by De Cataldo who was a judge in the 70-80's, I really love this book
all this story is a real story about Banda della Magliana, only the names were changed, and it's very powerful to understand how criminality worked in Rome and in Italy
bologna's rail station is just in front of my office, and I was there the day when the sequence was directed, but i didn't see it

... however in the movie there is the wrong side of the station (the right), in 1980 was the left side shut by a bomb
now is out the director cut/long version of this movie, with about 30 mins more than the first edition on dvd...