[eastcoaster]

It is a pretty cool tool, I have used it, too.

However I have found that measuring a route via the odometer in my car, is more accurate with regards to distance. I have measured a couple of USATF certified race courses with it and it comes up a little short when compared to the odometer.

Another issue is that it does not tell you how flat/hilly a course you plot is.

Still, it has its place.