Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poorly manufactured and poorly edited

The book's approach towards teaching Japanese grammar and vocabulary seems decent, but the poor manufacturing and poor editing of the book make it hard to use. The binding disintegrates quickly, which makes it hard to use for learning-on-the-go. The book appears to be an abridged version of a longer text - and thus many of the practice questions and answers are out of sync and/or missing, due to sloppy cut-and-paste work. Even worse, there are outright mistakes in the text - for example, on p. 72, "arimasu" is asserted to be the verb for "wash" in a practice sentence (it's actually "araimasu"; "arimasu" is a different verb which doesn't even make sense in context). Berlitz's lack of quality control is disappointing.