Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very good but beware the 4th printing (edición: marzo 2000)

Clave Diccionario is a very good dictionary. Particularly nice is its clear distinction of words you may hear and words you should use--e.g., privacidad (anglicism) vs. intimidad. I recommend it for all the reasons stated in the comments below.One caveat, however, if you do obtain a copy. Do your darndest to check that the volume is complete. My copy, printed in March of 2000, is missing pages 77 - 124 and has duplicates of pages 125 - 172.