We haven't been disappointed. The illustrations are very clear, and very much to scale. I love having clothing patterns for the dolls available- they're worthwhile even if you never make one of the dolls. The clear directions make it almost easy to make a face that actually looks like a face. The supplies lists are very straightforward and doesn't include anything you can't easily pick up at your local craft supply stores.
I highly recommend this book, even for children. A 6 yo is a little young to be able to carry out the project on her own, but working together with an adult is very possible.