If Husband's trip from FCO to BOS was any indication, premium economy on Alitalia is not worth it. The seats are nicer, but the food is terrible, and an amenity kit and a little more leg room hardly seem worth an extra $400 one way. If the service were better than in coach, that might help. But unlike many premium economy products, where the food service is similar to biz, on Alitalia it's the same as coach, you just eat first.
The good news was that $250 of it was paid by Citi, for his yearly airline fee credit.