I just received this Zenith keyboard today, and I gotta say... this keyboard is just amazing! I was afraid that I wouldn't like yellow linear ALPS, but the feel of them is very comparable to my well-loved black ALPS (just minus the tactile bump). However, I'm sure that my liking for the switches is greatly due to the construction of the keyboard. The durability and construction of the keyboard is superb and is very comparable, if not better than the IBM Model M.
This keyboard is definitely my new favorite old school mechanical keyboard. Don't let the construction of old NMB RT101+ or Chicony KB 5181s dissuade you guys from purchasing more old DIN5 keyboards. I'm totally looking forward to getting this keyboard with green alps when I've accumulated more keyboard dollars.