Our 16yr old daughter went last year and loved it
The first time we got the letter we threw it out-and then were rather embarrassed when a friend's mother mentioned that they had nominated her. They do ask each student to nominate at least three other students for future trips. I don't think it is as exclusive as they might like you to believe, but it is a legitimate organization, found by Dwight Eisenhower.
Our daughter went for just under three weeks to Europe. Her group had a group meeting every month from Jan. until they left in June. They did lots of bonding type activities and some learning exercises regarding the various countries before they left. While some of it seemed like busy work, it did provide a means of getting to know the other students before they left.
I thought it was a lot of money, but they did visit lots of places you wouldn't have the opportunity to visit on your own, and it was an educational experience. Their tour was a little different then most in that they didn't do any home stays, but stayed in hotels as a group for the entire trip.
She came home much more self-confident and comfortable in various situations.
They met someone from the Parliment in England, went rapelling off a castle in Wales, did kayaking and water activities at the UK Sailing Academy on the Isle of Wight in England, toured a chocolate factory in Belgium, learned about Irish traditions from a couple in Ireland, toured Anne Frank's home, took a couple of gondola rides, and climbed the Eiffle Tower, for a few of their activities.
For her, I would say it was money well spent. She is very interested in history, and this trip allowed her to see and do things she might never have done otherwise. As she is contemplating going away to college next year, and looking at schools that are a distance from home I feel much more comfortable knowing how she handled herself on this trip. She also has a better framework to judge whether she wants to go further away, or not.
The chaperones were wonderful. Our daughters have traveled on a lot of church youth group trips, and after comparing their experiences we feel the People-to-People group did a wonderful job making sure the standards were clearly defined and upheld through out the trip, and that they went out of their way to make sure the students were comfortable, fitting in, and safe at all times. Emilie's main chaperone actually emailed the parents periodically throughout the trip with brief up-dates. Since she only called home once, it was nice to get glimpses throughout her time away as to how the group was doing.
Depending on which trip it is, and what interests your child, I would highly recommend it--probably more at the high school level, rather than the middle school level, though.