Some rough edges here, but the concept is really nice. The good: exercises walk you through what you need to do visually. builtin timer including reps, hold time, etc. Audio cues mean you don't have to stare at the screen. The not so good: visuals didn't show at first, not sure why. Reminders are klunky and only 3, I have 5/day, no go. It wasn't obvious that I could tweak timing, exercise was too fast, once I figured out that I could change it, wasn't sure which setting to change, confusing.