Great and most detailed review that I have seen. I have Das Keyboard Ultimate with Brown Cherry MX. I actually wanted Blue switches initially but found this keyboard at incredible second-hand sale, since the Ultimates are hard to re-sell thanks to their queerness. I am quite happy with the brown switches - it was a decision that someone else made for me, but I am happy with it.
There are minor quirks with this keyboard, of course having the ultimate kind I am not going to complain about backlighting or the laser etching wearing off :-D. But even on the black keys the quickly developing shine is annoying not only to look at, but also to touch. And Das Keyboard is not offering any keycaps replacements. Their support is quick but they just said sorry, we do not offer replacement keycaps. They did not even suggest any fitting aftermarket solution, so if somebody is able to point me in the right direction I would be very thankful.
Another interaction with DasKeyboard support was also swift, they really do reply quickly, but it was another "no". The LED indicator lights are designer's dream, blue, small apertures, however they are super intense. If you approach your computer in a dark room, before you sit behind the desk the num lock light will perform a minor laser eye surgery on your retina. So with all those microcontrollers and chips inside I was kind of hoping there will be another way how to dim those lights rather than sticky-tape over them. Nope, there isn't.
USB3 Hub is fast-enough but it has a nasty habit of blue-screening my Windows if certain devices are plugged in (which behave normally in a standard USB 3 hub). Charging your smartphone over this hub, however comfortable, is not a good idea as it will take forever and then some. So it is good for some occasional USB stick job, it has my mouse receiver and it can charge my wireless mouse. A bit over engineered and overpriced solution that does not live up its potential. It handles very well task for which USB 2 would be more than enough.
Despite the shortcomings, I am very happy with Das Keyboard. I love the metal top, the weight, the sound, angle, full roll-over, there's just still a lot to love!