After reading several reviews of other books, and this one, I can say (without having purchased others) that this one is very good. I do want to stress that depending on the child's age and development, there will likely be a delay between your teaching, and their learning, and another between them being able to replicate the signs. I had almost given up teaching them to my son when he did the more sign. I'd almost missed it, because it was different from what we'd been teaching, but like speaking, at first the sign(word) comes out - his way - so watch for their signs to be quite imperfect at first. Seems that this method of communication relieved a lot of the stress he was having in not being able to communicate. Just imagine if you woke up one day not able to tell anyone your wants and needs. Well, that's being an infant (and a cat). These signs are the first steps on the road to communication, and I can almost guarantee both parent and child will have an easier time if these are practiced.
Rating: [5 of 5 Stars!]