I would rate this at ok, works good most of the time, sometimes not at all, have to wait for it to open or close. 
I don't like the fact that if you bump it by accident, it locks, we have it at out cottage and if I'm outside near it with my phone and it is busy weekend with many people around, if someone touches it by accident, it locks, should have a minimum contact time of 2 seconds to activate, this would eliminate this issue. Not an issue if there isn't a phone on the outside to allow it to activate.
Otherwise It works ok.