So, I gave it the good 'ole college try. I've been using Apple CarPlay since I got the car. It works.
Slide the phone in the designated slot, plug it in using the extra short 6" lightning cable I bought for this specific purpose... still I can't use Google Maps. Worst of all, with the phone tucked into that slot, I've actually forgotten and left it in the car several times.
I can relearn retrieving my phone from the slot, but I just can't use Apple Maps. Address voice dictation is horrible. I can't say: "1-1-3-4-0 Main Street", instead I have to say "eleven thousand three forty Main Street". Can't get used to that.
In my previous car/setup, I have a phone holder with the phone connected to the car via Bluetooth only. In that car, the holder is permanently attached to the dash.
I have this spare Macally cup holder phone mount.
, on Flickr
The only thing is that pressing the phone button on the steering wheel > 2 seconds results in OnStar instead of voice commands for the phone. Good thing the phone is easily reachable and pressing down on the home button activates Siri voice commands.