Pros
You have the hope of one day transferring over to AA as an internal candidate, sponsorship from AA which includes benefits that an AA employee receives: health, 401k, flight benefits. Good stepping stone if you're wanting access to AA the airline.
Cons
As the new AA moves forward the credit union stays behind with its rigid culture. Chances of promotions are slim since there isn't much movement in upper positions. Requires a one year commitment in any position you accept (something AA did away with). Pay is mediocre and it seems they feel they can get away with it because of the sponsored benefits received from AA. 2 week vacation, since each department goes off seniority do not expect a favorable outcome as a newbie; also because the credit union is a financial institution you have to take a mandatory week off (the week you're required to take off is used from your allotted vacation). Cannot really use flight benefits because you can end up getting stuck trying to come back home and if you don't show up to work because you got stuck there is serious consequences. Attendance policy is horrible and not flexible, if you get sick it is considered an occurrence.