I recently purchased the black version of this keyboard in the MX Brown variant, and I couldn't be happier with this keyboard. The packaging proudly proclaims "High-End Keyboard", and it delivers. The board itself is very well-built, with a thick plastic outer shell, and the keys are also on a thick metal mounting plate, which means that this board feels like a tank. The keys are thick, 1.5mm (double-shot) PBT, and they are a joy to type on. They're a bit shorter than the standard OEM keys that most other mechanical keyboards have, but they feel good and sound great. I don't think that I'll be replacing these anytime soon. Mini-USB cable is detachable with cable-routing gutters on each side, and the feet are rubber-tipped. My only complaints with this keyboard are that there are no legends for the media controls that this keyboard has, and since the manual is all in Korean, it took a bit of guesswork to see what buttons did what.

I have two of these. Both amazing build qualities. I have one in blues and one in silent reds. The silent reds feel and 'thoc' amazingly. It's a good weight for a 75% keyboard and the keycaps that come with them are quality PBT caps.

I got one of the new FC750R's with Cherry MX Red switches that came in on Oct 31. Mine had something wrong with the right stabilizer on the spacebar, so that it was loose and the space bar produced a rattle when pressed. The spacebar is loose even if you tap it lightly with your finger on one side, while the other side is completely solid. Not sure if I just got unlucky.

Here is a video of someone having the exact same problem as me: https://geekhack.org/index.php?topic=89860.0

I ordered cherry mx silent reds. Coming from a CM Quickfire Rapid, the build quality is amazing! This is my first high end keyboard and for the price, it's hard to beat.