Nope but when i saw the students they seemed very well disciplined and in check unlike the majority of high school students.My sister is going to do it when she reaches high school.
Over here we have something similar, it's called a different name and I don't think it goes quite to the extent as it does in America.
There are a few kids I work with who are in the Territorials, I'm guessing the discipline and activities wouldn't be massively different. It's really helped some of them with their behaviour problems, and given them something new to focus on. One of them told me it's the feeling of belonging to something that they enjoy the most. Maybe you could look into it a bit more first, don't go for it just because your parents want you to. It's you who has to deal with it all