One of my friends bought one when she was starting out. It actually did help her, and she's a pretty good artist now. And thank god, her drawings look nothing like the author's.

It was like a hybrid of typical shoujo manga and 80s/90s American cartoons; more of a Japanese-inspired style than authentic. And the styles differ from artist to artist anyway, so I don't really get why he'd try to stuff it all into one book. He sold his way of drawing, not the Japanese way, and I don't think it should have been labeled manga because it wasn't.