Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very often frustrating

I bought this because the first few definitions I looked up were clearly and simply defined. However, as I got to use it more and more, I became increasingly frustrated. I realised that for this Kompaktwörterbuch, Pons had simply extracted a subset of words from the Großwörterbuch without further consideration. Consequently, some definitions are defined using words *not* found in the dictionary. Really, it's unforgiveably careless, and has put me quite off Pons. For example, "missmutig" is defined as "verärgert", which is not in the dictionary! Another example: "beißen" is defined as "mit den Zähnen erfassen und zerkleinern" - you guessed it, neither erfassen nor zerkleinern is in the dictionary. However, I give it one star because it's cheap and the layout is excellent.