Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No mapping capability at all...

Just keep in mind that if you buy this product, you will not have the capability to load any Mapsource data, or any map data at all. The unit does not come with even a rudimentary database, and although there is an optional (and riduculously overpriced) PC interface cable, you won't be able to upload anyting into the GPS unit. No street maps, no topo maps,... nada. Other comparably priced units have this capability, which seems to me to be absolutely essential if you actually want to use a GPS unit to be able to navigate, which, let's face it, is the only reason that you would buy one.