On our main tv, the Chromecast Google TV keeps freezing, and the picture quality can be horrible. Watching the "Stats for Nerds" connection speed - can go from over 80,000 Kbps to 300. Insane.
We have Google Mesh wi-fi and the TV and dongle are within 20' of TWO different routers. The wi-fi is attached to a very stable 300 Mbps fiber optic cable.
Just about had it with this terrible quality. By the way, this is the second dongle I have installed on this TV - the first one was replaced under warranty.
I had a problem with mine until I bought the ethernet adapter now it works perfectly no freezing And I too have the Google mesh system