I have one now that I'm restoring, picked up at the family farm in Saskatchewan. It's been hanging in the front hallway with a 22 Cooey for years now. The only thing that would also have been there but I acquired it a few years earlier was a half stock Enfield that I also restored.
I say restored because to many farmers guns were just tools and many were neglected when they moved off the farm.
As far as reliability and simplicity, Nothing is more reliable and simple than a Cooey shotgun. It will fire any ammo that can be stuffed or forced into it. (including old paper ammo that would make any semi auto or pump gag)