Nike+ SportBand (Silver)
I bought this recently and then exchanged it for another. Neither worked properly. Both units failed to record actual mileage. I have a standard 3 mile running route. I set up each unit as detailed in the instructions, and both times the mileage at the end of my run was off - by 1.5 miles with the first unit and 2.1 miles with the second. When I tried to calibrate by linking to my computer, the software said my runs were just 'walks' and that the discrepancy was outside the margin of error. So unreturned bo