I am using the app for training with my Dumb Bike (Spinning bike with power pedals). It is very straightforward and minimalistic, exactly what I was looking for. It works also with smart bikes (auto-adjust resistance). They are constantly improving things and the support is very quick if you need help. As a bonus the web version has a nice feature to help structuring a personalized, up to 28 week long training plan (Coach Jack). Can recommend!