Received this just today and loving it with the tent. Replaced the last piece of microsoft thing on my desk... and man does this keyboard feel great. I've got an order of Ducky Seamless PBT Doubleshot keys on order though... that is the only downside I've found to this keyboard so far.
jrrrI couldn't replace all of the keys (obviously) but it did cover the majority of them. The hardest key to find is the 3.5U R4 space bars. It did lower the brightness a little bit, but the R1 PgUp key feels weird next to the R3 Enter. I do like having specific row keys rather than using a flat R2 across the board. The Ducky PBT Doubleshot caps feel much better and there's a lower thunk on the Cherry MX Reds when the keys bottom out, even without the damper rings. I'll grab some photos here after bit.