I had one for nearly 4 years from new (sold it to update to a 159). This is an awesome car. Mine was a Monza, that's only Australian for 156 with sports pack 3.
That 2.5 litre V6 engine is a free revving engine that demonstrates ALFA's racing heritage most convincingly. I had a twin spark (also from new) before that and the v6 stands head and shoulders above. There are no words to describe it other than the words once expressed to me "... as close as you can get to a 156 GTA..."

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Cheers and God bless,
Magnum