I've read Kress before and while I admit he is a wealth of knowledge and insight, I did not find his accessible or particularly compelling until I read this book. The first book I read was more textbook-style (and co-authored, so perhaps it was the other author who I enjoyed less), while this book is a persuasive call to action for practitioners to recognize that writing is a visual medium therefore, other types of visualization should be recognized and possibly utilized in the writing process.
This book also made Kress's ideas of signs, signifiers, etc. more understandable, which is welcomed. Hardly anyone will follow you if you can't be understood. The inclusion of children's work helped support the ideas presented. Even though I am looking at collegiate students at this point in my research, I found much of this content transferable.
What was lacking was any kind of personality. Visual artifacts are fun, as is the process of creating them, but Kress comes off dry and distanced from his ideas.