I borrowed one from a club member to try for a week. Personally, I didn't care for it, and as I was tying at shows for awhile, it was also cumbersome to tote along. I went back to my Renzetti traveler with cam jaws and am very happy. I should add that I don't tie flies in any volume, and I can see where the Nor-Vise would excel in this regard.
On the other hand I have a good friend on this board who LOVES his No-Vise and found a way to travel with it without breaking it all down and stowing it. We often tied at the same shows and both liked our decisions.
If I were you, I would try to borrow one for a trial just to make sure you're going to enjoy it, especially since it's an investment of significant dollars. I think this is a vise that a fly tier either loves, tolerates or hates it. But that's the way it is with all vises, which is why there are several successful manufacturers of different style vises.
Joe
Joe Valencic
Life Member FFF
Rod Builder in Chains