No info from OP on this, but I have the same sensor.
It was touchy to pair, but once paired, it works well.
The only issue is that it doesn't return command status for a long time.
* For the Almond UI, that's ok, because it just shows the door is "Opening" or "Closing" for that time.
* For Echo integration, Alexa will always time out and say she could not get it to work.
Also, before the door mover runs, it beeps and strobes for 5 seconds.
* This is to warn anyone in the area that the door is about to move.
* That warning cannot be adjusted nor disabled.
All of that being said, I'm happy with it. I drive off and realize I left the door open, I can do it from the almond app.
I come home from a bike ride, and I can open the door from the app.
Now, if we could just get phone alarms, alerts, SMS, and email for sensor events, that would be even better.