I recently installed iOS 11 on my iPhone SE. Then I tested CarPlay in my 2017 Volt. I had a chance to try out Apple Maps guidance and prefer the new map display, especially now that arrival time, minutes to destination and miles to go does not disappear when approaching turns on the trip route. Even though Apple Maps now displays the speed limit on the current road I have observed several times that Apple Maps displays an incorrect speed limit, so always check the road signs. I had trouble getting Amazon Music to play. I was successful once I started Amazon Music from the phone instead of from within CarPlay. I notice that Spotify (Free version) no longer works with CarPlay. I am not sure if this is a change in Spotify's terms of service or a compatibility issue. I did experience one hiccup where all audio stopped working on the Volt Infotainment system. Shutting off the Volt for 15 minutes seems to have reset the system, fixed the problem.