I don't think many people have any objection to the SOUND of the Audya... I certainly don't, and really the only negative I've heard so far is some peoples' objection to how up front the drum sound is (they have got used to much less emphasis being payed to drum sound, IMO).
But most of the negativity to do with the Audya comes from more practical considerations... Price, first and foremost, dearth of dealers anywhere near most people (in the event of a problem), slow tech support (who can afford TWO for a backup one?), and glacial bug fixing...
Then there are the practical playing reasons... Complete inability to revoice audio loops (so you can do a style with different kits for different songs), complete inability to edit loops (so many styles, you only have to move ONE kick drum hit or a snare beat to make a style fit a song PERFECTLY... no chance of that with a loop), and, at least to my ears, STILL a very noticeable difference between basic guitar chords and more complicated ones that make the Audya switch from audio loops to MIDI guitars that don't match well.
The Audya's demos completely blow one away when you first hear them, but be prepared to listen to them sound pretty much the same for as long as you own it. MIDI based arrangers can be edited to sound completely different, in Roland's case, with the minimum of effort, too. Add to that Ketron's past performance when it comes to providing NEW audio styles for the SD1 and the difficulty of making your own audio loop based complete styles, and probably the vast majority of Audya owners are going to be playing the same stuff the day they SELL the Audya as the day they bought it...
But none of this changes just how GOOD it sounds, OOTB...
[This message has been edited by Diki (edited 09-21-2010).]