I use it for a silent alarm everyday. Works perfect. And it repeats until you snooze or dismiss the alarm
During workouts, the only thing I have notify me is phone calls, because if someone is actually calling that means its an emergency. And I can feel the vibration no problem at all.
Maybe asked differently -- can you compare the vibration and speaker (sound) to the F3?
I find that I can often barely hear beeping from the F3 while running (during a workout or lap alerts). I feel like I almost never feel the vibration while running.
I sleep with my watch and tried alarm once, it didn't wake me up.
Every day use bluetooth notifications I generally hear and feel OK, however.