For over 2 years I have had the Omlet door on my coop. Works every day without fail.(Knock on wood.) And it can operate an optional coop light if you wish. Easy to take care of.
18 months with my Omlet door, and no problems. No buttons for critters to touch. I finally changed the batteries for the first time since installing it, just because I am afraid they might go bed during this upcoming sub-zero weather.
I have had an Omlet door. It has worked all through the hard winter here in Idaho. And it has been one year this month, It was worth the money. Here is where I got mine...