tl;dr: This keyboard is either pretty uninteresting or is exactly what you've been praying for.
The Rapid Si (Rapid i/Stealth Edition) is the only keyboard on the market that's both backlit and front-printed. To some people, those are the two sweetest aesthetics - and it's exciting to finally have them in one board. If not, a Quickfire Rapid is cheaper and exactly the same.
Actually, there's not that much more to write. Everything is precisely what you'd expect. Fit/finish is typical Cooler Master - which is to say unspectacular but very nice. Matte black case with ABS OEM-profile keys to match (Duzeyao shows a white keyset too, but I haven't seen it). It's got fine lighting effects - tho no ARM processor onboard, which means nothing super-complicated like the Rapid i. The backlighting is crisp and goes from comfortably dim (I wasn't blinded in a pitch-black room) to extremely bright (visible in daylight - looks like crisp white doubleshot text.) Pulling off a cap, you can see that they just moved the LED to the bottom. That, with its unique translucent side-printed text = your Mom. Or this keyboard.
I hate brown Cherry switches - which is the only way it's being released, at least for now. With a little DIY you could either solder in different switches or move the caps to a different board that happens to have bottom-mounted LEDs, like the orange Monoprice TKL or the KPB V60 (CM's not selling the caps separately), and you could recoup some of the cost by reselling the original as a backlit-Rapid/ghetto Rapid i. But I definitely don't care enough to do this.
FWIW, according to a post @DT, Filco patent on front-print = it won't be released in the EU (confirmed w. CM reps).
