I am about to pull the trigger on buying one; I'll report back when I get it. That said, it is strange that there seem to be no reports at all from actual users. I'm guessing they haven't sold many, although I would love to be proven wrong.

Main System: MD600 & Sonos Connect -> 818v2 -> DSP5200SE+DSW SUB
Alternate Main System: Sonos Connect AMP -> Dynaudio Contour 1.3 SE speakers + Sonos SUB
Kitchen: Sonos Play:1
Bathroom: Sonos Play:1
Bedroom: Sonos Play:3