In addition, the classifier found words that were used in reviews to describe situations connected with a product and its features: for example, (service) was often used in descriptions of quite unpleasant situations when a user had to turn to a manufacturer's post-sales service for repair or replacement of a malfunctioning phone, and (user) was often used to describe what one can do with some advanced features.
the classifier was able to capture some product-specific as well as market-specific sentiment markers, however, it was not able to distinguish the context these generally objective words were used in.