I can't tell from a cursory look at the website whether they have the course program with achievement levels and awards. That was a big selling point to hard-charging musical kids.
It's also been used in our altar server program with good effect -- the kids work hard for promotion and master a considerable amount of difficult material.
It's funny, the junk is losing its appeal for a lot of directors, but not so much for some of the people. I think it's hit and miss. Not all parents see the value in learning classical musicianship. Sad.