i have clocked up over 2hours running with Apple Watch so far and I am disappointed! Yes I have even dragged my iPhone 6 along for GPS. However it just isn't accurate! Today: Garmin Forerunner 620 7.02 miles Apple Watch 6.85 miles This is unacceptable! That distance difference is huge! The garmin has proven accurate over IAAF measured courses, so I trust it. How can Apple Watch get it so wrong when the iPhone is paired?