I was using the 62st. I am more accustomed to the 60csx, and have had good luck with that as well. I was surprised at the difficulty the 62st had. But it was downtown San Francisco and some pretty tall buildings. it worked fine in areas of open sky like large intersections and lower buildings. I ended up using the two devices (which looked a bit strange to locals). I drove in with a Nuvi and had the same issues once I got into the downtown area. The signal would jump around at times or fix in a bad location a block away.