Depends on the kid and the APs taken. I have seen kids struggle with 1-2 AP classes and others who did fine with a schedule literally full of them. Common mantra here is if you take a lot of APs, you won’t have any time to do anything but study. May be true for some kids but not for all. And they get 5s on the exams as well. Sounds like your daughter has done well. Congrats to her.