I've had my QFR (the black one with reds, not the gray one with blues) for about a year now, and the keycaps still look pretty pristine. The only keys that are showing signs of wear are the WASD -- all of the other keys still have raised white lettering, but the WASDs are almost worn smooth, so the white paint is getting thin. Especially the W key.
I'm looking into some more durable replacement options for the WASD.
I sort of like the simple, modern font on the QFR, I just wish there was something similar, but PBT or doubleshot.