No ive only watched the first season, but im guessing the the seasons are exaggerated and watered down versions on the first season.
If you enjoyed the first season, id definitely give the second a shot.
All the seasons are different stories though.
Although the latest season Fat Tony and Co, has the characters from the first series.
There is a few movie long episodes also which are pretty good, including Colin McClaren's story of infiltrating the Ndrangheta and a few others.
