Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your time...

I have used several GPS units (Cobra, Garmin, Magellan) and this is, by far, the worst of the bunch. Same problems as others have noted: no signal on a clear day in the middle of a field, lost contatct with satellites on a regular basis, HIGHLY inaccurate for both direction and elevation, and the compass is NEVER accurate. You'd be better of using blind luck to find your way around. Spend a little more for another brand and save yourself the frustration. Mine's going back to the store ASAP. (Now where's that receipt???)