I've been in touch with Reef Eden, and I understand his perspective; it's all hand built and CNC milled rather than built overseas with cheap parts.
That being said, I have the impression it's pretty much untested, at least over the long term. I have a hard time seeing it work well. Or at least better than any other all-in-one systems. The tray of substrate strikes me as extra weird.
I could almost see spending that kind of money on a good system; we frequently spend that much building a system from scratch, especially using premium parts. But with a custom built system, you can change things if it doesn't work. Not so much for an all-in-one.
I suspect the Kreisel flow design is a "if all you have is a hammer, all the world is a nail" type issue.
I'll be interested to see how it does. I think the market could use a seahorse-kit. I guess time will tell how well it actually ends up working.