I've heard the big Giya speakers at shows, listened to the Oval speakers at a dealer, and listened several times to the Kaya at a friend's place.
They are indeed "vivid." Super transparent, detailed and sky high airy high end. Everything sounds "right there."
However, to my ears, I found it more of a "hi-fi" vs "natural" sound.For instance, even well recorded voices tended to sound unnaturally vivid/brightened/sibilant/electronic. I remember in particular a Joni Mitchel track, and the Kaya produced a super clear sonic image of her voice, except it just didn't actually sound very human. More like a super vivid electronic hologram.
The same track at home (on my Thiel 2.7 speakers/conrad johnson tube amps) sounded significantly more fleshed out, relaxed and more like a real human voice.