The door operates on a motor that goes up and down via a motor that runs up and down for an adjustable 18-23 second timer. Which is a very crude method and WOULD work fine. Except the motor moves VERY slow when cold. 23 seconds will only open it halfway on a cold morning.
So you walk out, get it to finish opening, and then walk back out at night to get it to close all the way. "Automatic" you chuckle. The wooden door is easier.
The LCD display of the controller is sluggish and difficult to read in the cold too so adjusting it is nigh impossible.
Solar seems to work fine even on short winter days and in the shadow of trees and the construction is solid.
Will eventuall remove the controller, install limit switches, a photoeye and will wire and program an Ardurino unit to make it useful.
But for the cost of all that? Buy a better unit.