Yep...I posted about them back at the end of July.
They cancelled our 730 am flight in the middle of the night (supposedly no crew). Luckily, my BF was up and saw the change on one of our two reservations. I made both reservations originally and was never notified the flight was cancelled - no email or text message.
AA couldn't get us out for 2 days, so they put us on Jet Blue, which was fine, except we had to drive 3 hours to our final destination and the cost of the rental car doubled. Put in a complaint/request to customer service and have not heard back. The extra cost really rubbed us the wrong way because these were already almost $600 flights (in economy, on a weekday, and it wasn't a holiday).
Then our flight home got hung up because of bad weather in CLT. I understand bad weather happens, but when they have a bunch of cancellations like that, their app absolutely craps the bed. The customer service agents at the airports are limited, both in number and what they can to to help you. There were 5 of us traveling together, and the agent at the desk couldn't/wouldn't tell us if the flight we needed to change to even had 5 seats available. She said to "just change it in your app and see what happens". Three/five of us didn't even have an app that was working, and even after the flights were changed, we couldn't get confirmation or boarding passes in our app. The agent had to print them.
If you aren't on top of your reservation and watching for delays/tracking flights in flight aware and running to the desk as soon as you see a hint of a problem, you're waiting in a mile long line with hundreds of other people.
They are the worst at delaying, delaying, delaying, delaying a flight before finally cancelling it, often leaving passengers with no alternative but to sleep in the airport. They also have a habit of delaying flights to the next day, which shouldn't even be allowed (that should be a cancellation).
We booked through CLT this year because we had a similar situation through PHL last year - flight cancelled, stuck in PHL overnight (luckily we were able to snag a hotel room), only flight home to iAH the next day was through DAL. Had the exact same problem with the app not working, limited agents at the airport, and miles long lines.
We only fly AA because there is no other option for this particular destination (we visit friends near BGR once a year). But that makes the problem worse because we can't just catch a flight on another airline. I think flying to BOS and making the three hour drive may become our new plan.