I went to a Sonos event at a local distributor and as soon as I heard the sound from the Amp, it sounded like one speaker's wires had been reversed. They didn't do anything to make it sound particularly good and it certainly wasn't impressive, regardless of any comments about its sound quality from the Sonos guy. They had one at the front of the place that was connected to a pair of Polk towers and that sounded decent, but it wasn't playing very loudly and the music isn't anything I would use to demo an amp or speakers.

They seem to think their stuff is the best sounding- they need a reality check. Someone needs to put some of the HEOS pr MusicCast speakers next to the Sonos, to compare, so someone from Sonos can hear the difference for themselves.