Being a DFW resident we pretty much get stuck with AA and their lounges as the "best option" on most international trips (most options, lowest price, etc)... but often waive off and just pay more... because AA truly sucks that bad...
That said.. the trips to/from Guatemala we took last week on AA were absolutely perfect (gotta give them honest credit where credit is due).. flights left on time, arrived early, and the flight crews both directions were genuinely friendly, courteous, helpful, polite, etc..
I was honestly a bit taken back by it.. my experience with AA over the last several years has been nothing short of shitty..