Pretty good so far!

The app works well as long as you can hear the prompts. I had to use the lock in the app so I can hear the prompts which is frustrating if I want to change a song midworkout. Also wish there was a way to continue tracking distance once your done the program for days when you want to go a little further. Otherwise very happy.

Horn23 about Couch to 5K® - Run training, v3.3.4