I think the quality of a course very much depends on the instructor, whatever Agency/Organization they belong to.
I am an AIDA instructor and just got certified as AA instructor as well. Having experienced both ways of training, I found that they are quite different in their approach and their contents. The decision is one I'd rather not make. Personally, I am very happy that I took both kinds of courses and will, in any course, try to teach the best of both worlds, while sticking to the curriculum of the course chosen by the student as much as needed. Of course, an instructor will also try to adapt the course to the needs of the student. (which will not always be obvious to the student, btw.
)
I can only say that I recommend taking as many courses as possible with as many instructors as possible, simply because the fields of expertise and the approach of each and every one of them will be (possibly very) different and there will be a better chance of finding out what
Your preferred way is.
A formal issue is the QA policy that both AIDA and AA have, but AA seems to be a bit stricter as every single student will get a short questionnaire about their course, while AIDA will randomly choose students and ask them about their course.
So the good answer is: "It depends" - As allways.
