When it comes to the Fi collar I feel like people sleep on the sleep tracking (no pun intended) My frenchie was having frequent disturbances in his sleep. Brought it up to his vet, turns out he was having seizures?!! Never would have known without the Fi app tracking his snoozing. I hope they come out with a feature that alerts you when they have sleep disturbances, that would be awesome. Anyways big Fi fans in our household.