Never heard of this one. I'm in the market for a new pepper mill so this is a subject of current interest for me. A little googling shows rave reviews for features and usability. It is even mentioned as a "best" for Cook's Illustrated, which is an authority I have come to (usually) obey.
In my personal opinion, it is very contemporary in appearance, which could be a plus or minus depending on taste. For our primary mill, I personally want a commanding presence that says in a bellow, "Look at me, I've come to crush your pepper!" The Unicorn looks more like it would say, "Eh-hem, excuse me, would you mind if I took a turn at those peppercorns?" So, I guess it depends on what you want YOUR pepper mill to say...