I have done a lot of Disney race weekends but this was my first Princess. I was registered for the challenge but I was injured so I only completed the 5k and 10k.
The expo was well run as usual, and challengers were given bib boards and a luggage tag which was a nice surprise.
Disney provides buses to the start if you stay on property, so travel was a breeze. The course is always well marked, and the time limit is generous. You get to run around the Boardwalk and it ends in EPCOT, as do all Disney races. The medal was gorgeous (Merida, who was also on the course!) and the food boxes are always on point. Disney flat out spoils you.
The buses are waiting to take you back to your hotel (if you are staying on property) and they are always super comfy and not too far a walk from the finish area.
There is always plenty of water stops and several character stops as well, although the lines are usually pretty long.