It is as good as the reviews says.

Rating: 10/10 (8 March 2014)

I have watched this movie at least 15 times and every time I see new things. The story and acting is impeccable. Of course you can see that this movie is not made this Century, but that just adds to the (call it) charm of this movie. Like Sopranos this is more about Family than the violence and mob.
A genius introduction to the main characters are made. The movie starts with a wedding of Don Corleones daughter. Even if it take some time it never gets boring, and after the introduction you already know a lot of the characters in the movie. This is lacking in many modern movies. They do not use enough effort in the character building, it looses to the need of action.
So much is said about the movie that I do not think I can add something to it.