This is a great smart lock door handle. It was incredibly easy to install, very straightforward and intuitive. Programming the lock where is easy the instructions were very easy to follow.  It has continued to work flawlessly in this northern New York crazy winter vortex  that we’ve been in.  The subzero weather hasn’t affected it at all. I love that I don’t have to dig for keys when I get home. I love the way it looks on my door and I am definitely going to get a couple more for my other house doors. Highly recommended!!