You will be dissatisfied
I have been using the app with services for Chromecast, and the app is a piece of garbage and Google support is worse in addressing this issue that has been ongoing for over a year.
If you want to change to a different station, or switch what is streaming: 9 times out of 10 you will have to restart the app and use Google Home to stop casting. Even then you may have to do it twice.
I have done feedback to no avail. It would be nice if there was a third party app as this one does not do the job.
In addition, you have to put up with advertising in the app. I have three Chromecast devices in the house, when I go in the app to see the status or stop casting (see above as why you will have to constantly stop casting) there will be adds for stations.
BikePunkmaggie about
Google Home, v1.27.1208