I auditioned the M5 as a DLNA renderer with BubbleUPnP, and it worked pretty well. It did display a few quirks -- if memory serves, in removing more than 1 track at a time from the play queue. Since none of the (msny) other renderers I've used with BubbleUPnP had those quirks, I attributed them to the Bricasti's UPnP/DLNA implementation.
The sound was outstanding.
The sound was outstanding.