I used it today for the 1st time. I use Bluetooth earphones, so I kept it on the side of the treadmill while running. I did a timed workout and used my timer App on the floor right next to the rack I was using. Worked out great.
when running I use the JayBird BlueBuds X Sport Bluetooth Headphones. They are awesome. Battery lasts about 3 hours. Supper small and compact design. I typically run 20 miles a week.
For anyone still looking for a solution for running, cycling or exercising with the Plus, you may want to consider the Amphipod Airflow Lite. I generally use a SPIbelt running, but use the Amphipod when I've needed to run with my old 5s with mophie attached. The Amphipod fits (barely) the Plus with the Apple leather case.
One caveat with the SPIbelt and 5s, I generally wear the pouch in the front, but with the Amphipod I found it best to have the pouch in the back with the 5s/mophie. I went out for a 7 mile run with the Amphipod and a Plus yesterday and it worked fine.
Previously, I refused to consider the Plus because I didn't want to go for long runs without an phone, and I didn't want to have to maintain a second, smaller phone just for running. I learned yesterday that although there may be other reasons a Plus doesn't work for me jury's still out running and cycling isn't one of them. Hope that helps. YMMV
http://www.amphipod.com/products/holders/music/electronics/airflow-lite