This book is helpful for a course. It's definitely dated, but most of the signs are still the same, and our instructor does a good job of pointing out where the book is dated. Also, the first time I looked at the signs with arrows indicating movement, it was confusing. However, after learning signs in class and then looking at the book, it's easier to interpret signs I have to officially learned yet. I personally think this book is a good supplement to a course, but I am unsure how helpful it would be independently.
Rating:
[4 of 5 Stars!]