We just finished a 1500 mile road trip in the Gray Ghost, and our Nav never skipped a beat. For the first time, we actually noticed the GPS with the red X on it. My wife was the one who saw it first, and asked me about it. It would happen when we would pick the car up at the hotel valet, which was tucked under the building. As soon as we drove out onto the street, within seconds, the GPS was located and the Nav was rocking and rolling. This was after a day or two in the underground parking garage, or just a few hours.