LAX is ok, but standing there in front of LAX's busy premium check-in counter, hoping the agent you get is good, is a little unsettling, not to mention the murderous looks you get from the folks in the queue behind you. Pity you are not going to SCL, where AA has one of the best, if not the best true city ticket office in the system: walking distance from most hotels, extremely pleasant agents, OWEs welcome, seats to wait, reissues done with a smile, uncrowded,... what more can one ask for?