I purchased this keyboard to replace the previous unit because it was way too loud.  More accurately, my better half had me replace my previous keyboard because it was way too loud.  The design is nice, clean and minimal without sacrificing functionality.  And it is indeed very quiet.  Drivers installed automatically when I inserted the disc into the drive and everything appears to be working great.  I was also pleasantly surprised by how thin the unit is.  All in all, very happy with the purchase.  The only negative thing I have to say is that the box used to ship the keyboard in was way too long for the packaging.  While the shipping boxes width and depth seemed appropriate, it was about four feet long. 

Question: What is the best design?
Answer: The design is nice