The pros - This tiny, yet powerful device essentially obsoletes any need for wearing an HRM strap to capture Vertical Oscillation, Vertical Ratio, Ground Contact Time, and Ground Contact Time Balance

The Fenix 5 is a wonderful device, the GRDP is a bad copy of a good idea.

Very convenient coPared to wearing the Garmin HRM for running dynamics Information.

Delivers valuable information above and beyond my Garmin 935

Garmin Support didn't know if the issue was with the Pod or the 645 and opened up a support ticket for me

Garmin support says it doesnt, but I have proof that at various times its messaging took me out of running data

Works well but conflicts with the polar arm band which was what I was hoping to use with this to take a break from the chest strap

The Garmin has:Avg Run cadence (good)Max Run Cadence (not that useful, as it also is often bogged with false measurement, telling me my max is well over 200)Avg Stride Length (somewhat useful, as your speed is cadence times stride length with a correction for the bounce)Avg vertical ratio (good

, how much you bounce vertically as a % of your stride lengthAvg vertical Oscillation (not useful as its the previousin cm, whats the point)Avg ground contact balance (mildy useful as this is almost impossible to change and rarely a problem)Avg ground contact time (useful)When looking for running improvements you'd be more helped with braking

Love the simplicity of using the pod

Very convenient coPared to wearing the Garmin HRM for running dynamics Information.

I'm workingon improving my running.

The Garmin has:Avg Run cadence (good)Max Run Cadence (not that useful, as it also is often bogged with false measurement, telling me my max is well over 200)Avg Stride Length (somewhat useful, as your speed is cadence times stride length with a correction for the bounce)Avg vertical ratio (good

so it's not uncomfortable in the waistline while running

If the dynamic pod is worn incorrectly, the data will be inaccurate

If you like more data then this pod to get more data.

During races where I want to capture the most accurate data, I will still opt to use the strap since an HRM stap is always going to be around 1 to 2 beats more accurate than a wrist reading on the watch