Great mirror in many ways - looks, function.  It's quite impressive.  When you pass the mirror, the backlight comes on.  It would be great if you could adjust the time the light stays on.  Also, because of the horizontal orientation, you have to walk a couple of steps into the bathroom for the light to come on.  It's not a problem but it would be nicer if the light came on as soon as you walk into the bathroom.  Hanging the mirror is simple and secure.  If there is a power outage, when the power is restored, the main light comes on and stays on until turned off manually.  That could be a bit of a problem if away on vacation.  Overall, I'm quite happy with my purchase and would buy it again.  I have not tried the defogger.