Enforce your supervision expectations better!
My daughter mostly had a great time, but I was GREATLY disappointed with the lack of supervision on their tour leg in New York City. They allowed a group of 4 girls ages 12-14 wander around Times Square for 3.5 hours without an adult! I was SHOCKED! One of the girls had to call her mom to calm her down because she was freaked out. Then, the group got lost and had to ask a police officer which way to go. Completely unacceptable to let kids of this age wander downtown unsupervised. The teachers made it seem like no big deal when I complained, then pulled only my daughter out of the group the next day and still let all the other kids go off on their own.