When I was in high school, I went on a 6-week stay in France thru the Experiment in International Living.
http://www.experiment.org/home.htm
There are several programs like it out there (haven't heard of yours, but I've not been looking either). I suggest you talk to the people who gave your daughter the information, and follow up on their experiences, etc.
EIL was okay in many ways, for example. We got what we paid for, trip-wise. No one cheated us out of money. No pervert leaders seducing the students. There were some other problems I dealt with, which were a bit unusual, but not due to the program itself.
It's a great experience if your child is old enough to handle it.
bebu