I just stumbled on this and I have to say that it works great! This is exactly what I have been looing for. I hooked up a Linear FS20Z relay to old as dirt garage door opener and am using an Ecolink tilt sensor on the door. With the Linear relay set as a momentary contact switch the whole thing worked OK, but it in no way looked like a garage door.
Using this app, I now have something in SmartThings that looks and works like a garage door - like it should. I do not know why this is not more prominent in the forums than it is.
Just wanted to thank you for writing this.
There is one thing that I would like to see added - the ability to turn notifications on/off within the app and not have to go back into the IDE and publish again. Just a thought.