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Review title: Critical Deficiency
Product review: I returned this unit because of an inaccurate trip odometer and will probably replace it with the Garmin GPSMap. The accuracy of the odometer on my Sportrak was off by about 20% at walking speeds. Try the following test: drive a one mile course away from and back to your home with the unit on the car dashboard. You will find quite close agreement (within a couple of percent) of the odometer reading on your car and the Sportrak. Now walk the same course holding the unit in your hand. My unit would record approximately 0.8 miles on the odometer on the same 1 mile course. I have conducted this experiment with a Garmin unit (the Foretrex 201) and found this unit to have the same accuracy at walking speeds as at highway speeds. Since I wish to use the system for mostly walking speed trips the Sportrak was unacceptable to me.
