Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Self-advertisement

When purchasing this book/dvd combination, I was hoping to get an introduction to Tai Chi that I could practically evaluate and practice. Instead, what I received was a poorly veiled advertisement for the author's 4 DVD set of instructional videos.While the book does contain certain valuable facts about Tai Chi (history, etc), this is not something that you can pick up and begin doing Tai Chi exercises within an hour. The DVD on the other hand is almost completely useless and while advertising the full length 4 DVD set - looks as if it were filmed in the author's living room with long curtains hiding his sofa.I would not recommend this product. Two stars b/c the book isn't all that bad - but is not a practical application of Tai Chi - and that may have been my mistake.