The good news:
-It's loud and light and small, can take a beating, and if you boost the bass knob you can get some real nice low end out of it.
-You can actually use it as a chunky home stereo speaker. I'm guessing it's not as nice as his massively expensive dedicated listening stuff, but it sounds quite good, like a "real" speaker, not like a bass cab; I run electric drums through it occasionally and sometimes backing tracks or jam tracks.
-He's awesome to work with; incredible customer service and communication. Seriously. Still emails me from time to time with updates, concerns, and to check in.
-Mine's a first run; the newer cabs are actually even lighter with no tonal change since he switched to a different bracing scheme and type of plywood.
The bad news:
-He's a small operation; he's got a bit of demand for bass cabs at the moment, and build times aren't the fastest.
-Neodymium price hikes have made his cabs more expensive, as his custom neodymium woofer that he uses in them has jumped in price quite a bit.
-Duke LeJeune, the guy who builds them, mainly does high-end home audio speakers and stuff, so there's nothing about his bass cabs on his site.
AudioKinesis - sound that moves you
AudioKinesis Thunderchild 112 cab - TalkBass Forums
I can get you his contact info if you want. I don't know what the prices are right now; I got mine at an introductory price, and since they've been in production there's been the neodymium price hikes too.