Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you've bothered to study pinyin ... then this book sucks

If you have no experience with pinyin, then this may well be a fine phrasebook. But if you have studied pinyin (or are planning to) this book will be hopelessly confusing.What were they thinking of?My 2 cents: like it or not, pinyin is the standard for transliterated Chinese. I recommend spending a little time to understand pinyin pronounciation and get a pinyin phrasebook. You'll be happier in the long run