My daughter did P2P once in high school, hoops in Australia & New Zealand. She really enjoyed it. One of the things she did was trade all her USA team gear for various Australian sports gear at the end of the trip, which gave her really cool stuff to wear later.
I know she enjoyed it, I think it was good for her... But it was bloody expensive!
Plus, NWA doesn't go all the way to Oz so she only got miles from home to LAX, which was a drag.