What a timely topic! I just bought Peggy Martin's class on Craftsy and am ready to get started.
I have all of Carol Doak's books but I just couldn't get the hang of it. I even took a class with her.Carol is an excellent teacher. It was me. I just couldn't wrap my brain around it! But now things are starting to click. So glad I kept Carol's books. And this other teacher is great so far!
What is so nice about PP is the precision you can get. I've always wanted to do a New York Beauty (my home state) which is hard to do any other way that I know of.