I got one, and it seems to work good. A couple of weeks ago I was testing it out while on a hike and at one spot I could see the truck, but the pointer was showing 180 degrees in the opposite direction. Turned out I was standing under some big power lines and they were interfering with the signal. Once I moved away from the power lines, the pointer moved back in the direction of the truck. Another thing I learned when I had my Garmin, was to keep the GPS unit away from my cell phone. The signal from the satelites is so faint that the cell phone cuts it right off. Even when you aren't using a cell phone it is sending a signal to the cell tower, so it still affects the GPS if it's close to it.