We are never locked out. There is no key under a rock. The phone cannot get unpaired, the remote cannot be intercepted and replayed. If we are on vacation, we can call up a friend and tell them a code so they can get in.
A 9V battery lasts about three years, then it starts flashing and beeping every time you open the door for a month before dying. If you already have the right hole in the door, it takes about 20 minutes to install.
And if you're intent on breaking in, well, the windows are made of glass. Please don't do that.
They don't advertise this, super cool.
Oh and it uses a standard Schlage cylinder so you can get all your doors keyed the same, or swap it out with a high security cylinder if you so desire. (Lockpicking Lawyer even said not bad things about it!)
Fingerprint is a seriously cool. Except it doesn't work if your finger is wet, at which point you are back to just using a code.
Now, all that said, there are times I really wish I had the Wi-Fi model, knowing on my phone that, for example, the animal sitter has stopped by and fed the pets, is super useful.
But not having the Wi-Fi model is a trade off I have made in return for the security of not having another wireless entry point into my home network.
This may not be true for older models that may exist, so I would verify.