Hi - I booked our Poly GVC trip in May through AAA. It went pretty smooth. I will say that I won't book through AAA again unless I am doing concierge again, as the CRO CMs won't deal with you at all if you book through a TA, which they consider AAA to be. However, since I was concierge, I was able to communicate directly with the Poly Concierge staff and get everything done that I wanted done (ADR bookings, specific requests for room location, etc.) But like I said, for my next trip it looks like it will be either POFQ or WL (non-concierge), so I will book directly through Disney myself so I can call to change room requests, etc. and not have to go through only AAA.
Hope this helps! You will have a great time at the Poly concierge - I'm so jealous!
Leslie