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.