By the way, I heard the Kii Threes today for the first time. That's why I came across this interview in the first place, to read up a bit on the underlying design philosophy before listening.
Sighted listening impressions: Well, this is obviously a pair of very very good speakers. Or rather, it's a very very good complete system. What impressed me the most, perhaps, was the bass they produced. I don't mean just that it went deep - my sonos play:5 also goes very deep in spite of being a small box - but that I perceived the bass as really clean and tight. There was virtually no boominess in the room, in spite of it being small and not acoustically treated at all. It really seems as if Putzeys has accomplished his goal: To make a pair of speakers that can be put in most rooms, and which "just work". They sounded clearly superior to most other systems I've heard.
The clarity was also very good, and they produced a good stereo image.
Nevertheless, I was slightly underwhelmed given my very high expectations. This is what it is of course, sighted listening at one occasion in one particular room. But I wouldn't rate my own system as inferior, TBH - which consists of the DM10 monitors from AVI, a rather small sub from Ken Kreisel and management/integration in the bass region with minidsp and dirac live. I would probably even say that I prefer my own system. Maybe I'm just subconsciously rationalizing, of course. There are two commercial systems I've heard though that I would subjectively rate as clearly much better than both the Kiis and my own system: The Grimm LS1, also a Putzeys creation, and the Beolab 90 (even though there was something about the beolabs which sounded slighly slightly artificial to me). I've also heard some DIY systems which blow everything else out of the water, but that's another story.
But all in all, the Kiis sounded very good. For most people in most rooms, I think this might be a perfect solution.