As a renter I wouldn't like it too, I would think why does the landlord need to know when I go/come to the house. But as a landlord I use smart lock and the need is different, its useful because I don't have to change locks every time a get a new renter, I just change the codes (specially if I consider doing short term rentals/airbnb at some point/season) and I don't have to worry about any spare copies of the keys made by the renters.
Generally smart locks, in my experience, need internet to change codes without having to be physically present, not for lock/unlock functionality.