And it worked admirably.
And then I tried to call home. I pressed the button on the radio to trigger the phone, it asked me to "call name or number", I said "call home", and nothing at all useful happened. Actually, it just hung up. I repeated this with the home number and daisy_knotwise's cell phone. Ick.
So when I got to the mall, I parked for a few minutes to see what was up. If I dialed a number directly on the phone, the Bluetooth connectivity worked fine, but the voice recognition via Bluetooth was completely hosed.
Later, I sat down in the mall (after I had finished my Christmas shopping), pulled out the phone, pulled up the dialer, tripped the microphone, and said "call home" directly to the phone.
It wants to dial 22554663.
I have no idea what that number is, but it's certainly not a U.S. phone number.
In the category of things that I have no idea about, I have no idea how you get to a Nexus 5 phone running Android 4.4 and have a voice dialer that is so completely broken. I've poked around on line and discovered that other people are having similar problems.
Apparently, I may be able to use the Google Now voice recognition via Bluetooth and I will investigate that later.
But really. This is just brain damaged.