I find that the surface of the keys greases up very readily, and with the dark grey the keyboard looks pretty disgusting at times, all oily. Next time you look, the grease has all gone, then it reappears again … Never had anywhere near that problem with black FILCO keys.
The print is nice though – don't know what they've done, looks like they've painted on the letters. I'm waiting for Diatec to realise that "Caps Lock" is two words. I detest cheap pad printing (like in your photo above). I've got an old beige Packard Bell rubberdome which looks dye sub unless you look closely, so maybe it's just modern black keyboards that suffer from the visible dark/shiny reflective halo of pad printing?
Funny how after a weekend with the Acer, the Realforce (at work) was almost too light to use on Monday morning, but now I'm settled with it, my Cherry MX blue at home doesn't even feel tactile in comparison, just like a noisy brown. I'm still really hoping that FILCO Zero comes to the UK (all we have now is TLK US layout, not full 105-key ISO) as I'd love a Fukka keyboard at home.