Regarding the front fan grille:
Behemot (in the review) wrote:The front grill can be removed from the case, and quite frankly, I see no reason why it is actually here. Unlike with the rear fan it has no reason to have it here, there is the front panel so it's not like you can stick anything into the fans.
It'll be for RFI shielding, although they
could probably have made the holes larger to reduce the impact on airflow. To be fair, countless enthusiast-oriented cases cheerfully leave big electromagnetic "gaping holes" with their windows, although a handful were sold (years ago anyway) with a metal panel directly behind the window, so that they could comply with the regulations that way (example
here).
Those "Naidec" fans do look suspiciously like an attempt to invoke the reputation of Nidec there, too (even if the design itself isn't a direct knock-off). And so far as I know, 30,000 hours at 40°C isn't actually anything special either. At least a few other manufacturers (Superred/Cheng Home Electronic and Protechnic, from memory) have also used sealed but otherwise ordinary sleeve bearings, if I recall correctly.
And while I'm familiar enough with the fan connectors themselves, I had no idea they were called "mini-DMI".
(I know of mini-DIN, but that's a totally different thing, best known in its 4-pin version for S-Video and in the 6-pin version for PS/2 keyboard and mouse ports.)