Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Frustrating - and not just because it's a tough language

A very frustrating book. No, there's not much in the way of English language Estonian textbooks to compare to, but as compared to textbooks for other languages, this doesn't stack up. The explanations are inadequate, and most passages are only partially translated. The tapes are very nice to have - similar resources on the internet are spoken much more quickly. On the whole, however, this book makes learning Estonian much more difficult and frustrating than it needs to be.