Ctein bought the entire remainder of the Kodak Pan Matrix stock in the 90s. Since the color negative films are masked, they inherently produce initial prints with the right color and image characteristics. I've seen prints made by Louie Condax, Spot Inkley and others at EK that were produced by all of the methods described here so far and some experimental methods never seen outside of Kodak. They all work to some extent or the other.
Neg-Pos is always best! This can be proven over and over.