Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not deliver what it promises

I bought Klein's Etymological dictionary because I wanted a detailed one able to assist me in writing and public speaking. Despite the claim of the writer that it is unabridged, I found it very much abridged. I checked more than a dozen words in it and it was very disapointing. Ordinary dictionaries that don't even claim to be etymological gave much better insight into historical and contextual meaning of words than Klein's. I regret buying the book. It is not worth more than one-fourth its price. Those who want a detailed etymological dictionary should check elsewhere.