The only 'problem' I've seen is that when booking through AAA (or hotels.com since that was also mentioned) you have to go through the third party to make any changes, additions, etc. You could call Disney and ask general questions, but they can't open your reservation and do anything with it. Need to add DME? Call AAA. Want to fix a name misspelling? Call AAA.... you get the point. It's not a big issue if you know about it going in, but just as an example: Someone who had been blasted by hurricane Sandy needed to move dates and had booked through AAA. Disney couldn't do anything with the reservation. The person was calling on a Sunday, and was flying out on Monday. AAA is closed on Sunday. It CAN be a hassle. It doesn't have to be. But the same goes for any other third party. Expedia, Hotels.com, etc are definitely more difficult to make modifications through or ask questions through than AAA thought.