I just placed an order for the Infinity Shield Garage door sensor. It offers a full height door sensor to detect obstructions and replaces the low mounted beam used on most openers. I need to park pretty close to my door to maximize space in front of my vehicles and using backup camera can be a pain as on the Air, the camera won't stay on the rear setting when the vehicle senses objects in front and surround view isn't accurate enough. I REALLY wish I had this years ago as I closed my garage door on the open hatch of my Land Rover while I was distracted on a conference call. GRRR. Right now, it's 20% off at Amazon for Black Friday week (confirmed with the seller). I'll update my experience once I receive and install the unit.