I bought the red silicon vacuum line kit to accent my red and silver valve covers. Installation took probably 30 minutes. It was super easy. Each hose came in it's own labeled bag to make installation a cinch (as long as you have flexible fingers and needle-nose pliers). It sure looks nice now.
With some of those vacuum lines, if you had a leak you would have to take the engine out of the car to get to it, so replacing the 15+ year old lines while it's out is a smart choice. Then there are no worries.