Second to none.
As a serious amateur guitar player, I've written to many professionals whose sites I find interesting. By far, the most responsive has been Stuart.
I am very grateful that he took the time to write back and give me advice. He's a real and genuine guy! I am absolutely positive that his support for his course would be second to none. If you have questions and concerns, he will be there, enthusiastically, conscientiously, and with a genuineness not often found on the internet.