So... I've received one of those case yesterday!
Full Disclaimer: I received it free of charge, as a gift, to test quality and give comments; explicitly with no strings attached, they even said I could sell it and not do any kind of review.
I got the "Crystal limited edition" aka translucent Smoke Grey. I received a non-final version, so some details might change for final units. This is not a thorough review, just firsts impressions.
I must say I'm very impressed by the overall quality of the product. The packaging is professional and the shell itself of great quality. I'd believed that it was a genuine Sega product if not told otherwise.
The metal logo feels sturdy, and came separately with some 3M double sided tape to install it, so did the other triangle on the lid (darker grey on white DC, black here). If you prefer to transfer the logo from an original shell, it should be relatively easy (use a heatgun).
It doesn't have the bottom electrical hazard sticker. Mine also doesn't have the silkscreened Sega logo above the controller ports, but I'm told final units will have it.
I've been told that it was reverse engineered through 3D scans and manual touch up by someone who's job is completely unrelated. It appears to be a work of passion, and it shows.
I don't have the time to install my main DC in it yet, and I won't for several months, but I might post a real review then. Planning on having GDEMU, DCHDMI, dual bios, Noctua fan, internal SD, and pico PSU in that case as my endgame.