I am completely with Brendon on this one. C4 / Sonos " endorsed " driver is a complete joke. First of all it is missing the most basic functionalities. Just a fact alone that driver does not support manual input switching between line-in and streaming makes it rather useless in custom installations. I am not even talking about lost ability to use multiple sonos players as a matrix switcher, but even a simple one room solutions with Playbar is no longer reliable once you start switching between streaming and TV ( if somebody decides to use both Sonos app and C4 remote ). Don't even get me started on lost music services, lack of search functionality etc. , etc. . Needless to say I will be looking at Sonos competitors as well.