Been running nylon tube for the main length of the supply line on the Valiant for over a year. Install was considerably simpler than any of the metal tube installs that I've done in the past. In some instances I think that it is a better choice than metal, but it does come with a different set of concerns and install requirements.
The key important thing, I think, about using it is secure and robust connections. Pushing a piece of hose over it and tightening down a hose clamp on that isn't the answer. I used Wash-Down type Push-to-Connect tube fittings (from mcmaster.com) screwed into NPT Bulkhead fittings that were placed in brackets bolted to the car. From there I went with Push-Lok AN hose ends, but could just as easily go with hose barbs and clamps if so inclined or Braided AN stuff.