Using it!
I love the concept, but hate when I touch the phone screen by mistake or when I clipping it to my waist and it goes to pause or just close the app. Should be a way to lock it. I had to start all over in many occasions. I resolve the issue of my phone goes to sleep setting my phone to never and so far so good.
For sure this app got me out of the couch and ready to 5k in few months.
F99277 about
Couch To 5K - Run, Jog, Walk