Have just put them into the Green MKC case, and it really is nice. With the light coming off the LCD screen it looks like Las Vegas at Night.
Just the feel of the metal keys are far different from using anything produced in ABS or PBT. The temperature of the Zincs are never high no matter how much time you spend on the keyboard, it's always cool to the touch. I imagine it would be too cold to use in the Winter were there's snow and ice but here in Perth it's perfect.
I know everyone gets excited about PBT's and ABS but these babies really make typing an extreme comfort, they never stain from any dead skin (like what PBT's do) and the sweat never makes them slippery like ABS.
I suspect they will out live me now, plus the quality of them is right up there with Japanese/Taiwanese made goods. Each key is perfect and hand finished to a high standard.
I think MKC is now shifting into high gear now, or I just lucked out in getting the very best from these guys. I will always be buying more Metal in the future, it's far better than anything in plastic.
Feng, please ask them if they'll ever make any extra Zinc Space-bars? I don't care what it'll cost as long as I can get an all Zinc Space-bar.