My pros and cons for your program
Our daughter had a great time meeting new friends. Overall she had a good time. As a parent though, I understand that the main target to come and practice French was not met. Most of the other girls she met there were from other English speaking countries and as such most of the time (not in class) she was speaking English again. I would suggest you look into this. Also, the level of preparation and event organizing was not that great. To be fair last year we took here to Oxford where things were on a totally different level of organizing, but to be fair the price was much greater. So value for money was equally fair. You could make the organizing much better and increase the pricing. I believe it could work better.