Manual is not detailed genung. Can imagine that for some people will have a problem. Must have own rather play to link mobile and HR sensor, which was really annoying.
The app on iOS is an absolute disaster. Part of the data was not synchronisert and is now missing. Even worse, I find that the APP is an absolute battery-eaters. I can literally watch as the percentage goes down. Had the app uninstall.
The Sync via PC is reliable, but takes a few minutes. Does not bother me personally.
The Online App "Flow" is so far well done, and it can be highlighted. There you can see very detailed information about its activities.
GPS Sync and recording of distance, number of km, steps and activity work excellently.
2 star deduction for the miserable implementation of iOS app (and thus a contemporary Sync via Bluetooth), for the bracelet and the poorly executed instructions.