As a quilter, who dyes her own fabric, I was disappointed in this book. First, I think her recipe for stock dyes uses a LOT of dye. Procion dyes are not inexpensive and she recommends 2 Tablespoons of dye/cup of water. In most receipes I have used, the yellows use 1 T of dye in 1 cup of water, blues use 2 teaspoons, and reds 1 teaspoon. The author makes no differentiation between colors of dye in her measurements even though the dye companies and all of the other books I have used, do. I think 2 T/cup is overkill and wasteful.
Second, I don't understand her process for adding Soda Ash. I don't think it works well and felt that a lot of the color washed out of the fabrics as a result. Most of the books I've worked with recommend pre-soaking the fabric and this seems to work much better. (They use a lot less dye in their stocks and the colors are brighter.)
Finally, I tried some of her recipes in the book and was disappointed with the results. The colors on the top of the value parfait were too weak and none of the fabrics in that batch had the texture of fabrics dyed by the processes recommended in Dyeing for Quilters, Fabric Dyeing for Beginners, and Robbi Eklow's new book. I ended up over-dyeing them to salvage the fabric. They are the first pieces I've dyed in 6 months that I didn't like.
However, for individuals who want a simple approach to fabric dyeing this book may work well. It simplifies the dye formulas (by using large quantities of dye and omitting salt) and reduces the steps involved in dyeing value runs and color runs. If you don't mind spending the money on dyes, her approach is easy to follow and can yield decent results. I would recommend more agitation and squeezing in the value parfaits to get adequate dye and soda ash into the center of the fabric.
For folks, who don't mind a few more steps, I think the books mentioned above cover the subject of fabric dyeing much more extensively.