Whenever I’m driving, my phone is almost permanently mounted as a GPS. I also own the car thingy, it has very intuitive hardware buttons and a dial on top of being touch screen. This way I can leave my phone on the GPS screen and adjust Spotify controls on the car thingy without taking attention of the road.
The only real shitty thing I would argue is that you NEED Spotify premium not just to control your Spotify, but also to control youtube/mp3 player/ any other media that you would want to play through your phone.