Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Harman Kardon GPS300`NA - 2012 update

Great and inexpensive GPS system. Easy to operate out of the box after following the battery charging procedure. Unit automatically switches from day to night mode. The unit includes maps for Anchorage, Alaska which was not denoted in the description, the description stated that maps of Canada and America were preloaded. Clarification was requested but not received in a timely manner. I made the purchase with the risk that the unit was inoperable in Alaska.2012 update - had so much trouble in obtaining updates on the unit, I gave the unit away and purchased a new TOMTOM unit, much friendly and easily updateable.