Difficult to navigate. Every time I need to change a setting or add a device, I have to search to find "how to" videos and forum advice as the app is so complex with too many useless options. Unstable at times and I've regularly needed to remove devices and reconnect when they won't communicate with the app anymore. Same problem with group speakers, they tend to stop working, and removing and remaking them solves the issue. I hope Google can fix the tech issues, because I love the concept.