He was in our area this past autumn, and DD12 loved it. She loves art but has had little instruction, and she learned a lot from the workshop. We attended with another family, and their DD12 and DD15 both draw fairly well, the 12yo being a pretty good artist, and they both gleaned a lot from it. He assigns homework each day, and he looked at just about everybody’s work, even if just to give a word of encouragement, but my friend’s 12yo received quite a bit of constructive commentary from him.
I’d recommend the course to just about anyone from a willing and interested beginner to a student with more experience/instruction as well.