Great course for the adult beginner, or those who are returning to playing or wanting a prescribed structure for teaching their own older children. I use music tutorials for both guitar and piano and, like me, I'm sure others will know that successful books are very dependent on how you personally respond to the teaching approach and layout.
I personally think this is a really well constructed course - thorough, well ordered and engaging. The pieces, as with most tutors for this level, are neither the most exciting nor the dullest. But the exercises, explanations and illustrations are clear and there is a sense of progressing quickly, while leaving nothing out.