I've owned Sonos products for many years, and was very happy with them for a long time. The hardware is still a very solid product. But the hardware is unusable without the app, and the app has become very flaky over the last several months. About once a week it decides that one speaker in my network (not always the same one) is suddenly a different product that's no longer compatible and wants me to upgrade. Unplugging it and replugging it often fixes that, but sometimes I've had to unplug all.