I disagree with an earlier posted negative review of this material. I feel that this book and 2 CD set is excellent. I have searched for many books to help me learn to communicate with my wife's family in Vietnamese in my annual visit to Vietnam. This is by far the most useful. This material is not designed for the traveller who wants to learn a phrase or two. It is designed for someone who truly wishes to learn to communicate in Vietnamese. The book and CD force you to think and learn to listen in order to comprehend real conversational Vietnamese. In real life, Vietnamese people speak quickly. One will never learn to listen and speak this language unless you are given a strong push. That is what this material does. This book and CD set will make you work harder, but in the end will give you practical speaking and listening abilities. Expect to make a serious time investment in learning this language. As an additional comment, except for a fortunate few, learning any language likely requires real life experience coupled with this material. The material teaches terms and grammar from the north. This is the official version of the language of the country and is understood everywhere.