Nike Plus Errors

Just so you are aware. My Nike+ kit is consistently out. Just to make things fair – my 12.5mile run with Fair Havens came in at 13.5miles, hence an innacuracy of about 1 mile per 12.5.

I could probably improve the accuracy of this device if i went out and properly callibrated it – maybe a job for the next few weeks! If not maybe I should buy myself a garmin forerunner