I do find the kc06 pretty impressively spacious sounding but I'd describe the kc06 mids as butter. They are just so super smooth, but it doesn't gloss over details. Barry White wishes he were so smooth.
I find this smoothness it's primary asset and it's primary fault as well. Vocals and acoustic music sound extremely enjoyable but distortion guitar lacks bite and crunch, so hard rock and metal sound a bit too polite. Still, it's a great phone for a more relaxing, easy going experience and I definitely recommend it.