Product review (4 stars): Don't drop!!! They are surprisingly fragile!!!
Works great but ended up buying two because they are amazingly breakable.  It slipped out of my hand during installation, fell 2 inches and shattered....lesson learned....if I had known I would have been much more careful with it it (you have been warned!!, by me....it would have been super nice, and saved me $20,  if either the manufacturer or Amazon would have mentioned this....)