I have the book and I'm pleased with it. I think I only paid $12 for it at our local quilt shop.
I prefer the book to the tutorial. I don't live on my computer though, it's hard enough to get my teenagers to cut down on computer time, and I don't want to have to rely on it when I'm sewing. With the book I can piece at any time or any place (at a friend's, at a retreat, etc). Plus the instructions include step by step photos so you can follow it quite easy.
If you want to add to your reference library definitely get the book, it's well worth it.