Anyone ever heard of the "Simply Music" piano teaching method?
 

I'm looking for a new piano teacher for my son. His previous two teachers were college age+. It turns out that while I really liked the energy and enthusiasm they brought to lessons, they also tend to get married and move away to start new careers.:(

I know of a woman who lives nearby who teaches voice and piano. I've done some mixing for her, taught her some mixing techniques, and keep her Mac & PT system running reliably. She teaches from the Simply Music piano method. Does anyone have any experience with this method either positive or negative? It would help in making a decision on this.

Thanks