It is indeed one of the best keyboards ever manufactured. Unfortunately there just is no way to use it at work for me - quiet operation is required.
At Home: Sadly the UNICOMP-Keyboard is not 100% like the originals from the 80`s but I figured I find the extra (Windows-)Keys actually useful and there is a minor defect on my real Model-M that makes using the alt-key a pain.
The UNICOMP is the closest you can come to a real Model-M. I think it´s even better than some Model-M keyboards from the late 90s, but I might be wrong.