In my flight experiences with them (locally) I have had the best service with extremely short check-in, friendly staff, very attentive service upon boarding and decent snack offering on board.

When I was working there for 13 months, I made a habbit to fly them instead of Aerolineas b/c of the great service. They truly are a first-class airline within Argentina (haven't flown them internationally yet).

In my opinion, you can't go wrong AND you earn AAdvantage miles (except in their Miami runs).