My friend and I rigged the shifting cables up with powercordz prime and I had nothing but trouble due to too much friction in the handlebar part of the rear derailleur housing of the stock cable housing.
I recently installed Prime brake and gear systems, and also noticed a surprising amount of drag with the housing/ferules. I previously used ilinks and they feel virtually friction-free compared to the powercordz housing.
So I ended up using my ilinks housing with my powercordz, and they work a lot better now. I also did a bit of tinkering with the shifter housing interface, and shaved off material around to allow teflon liner to fit past the housing stops on the shifter to serve the same purpose as the nosed ferules and protect the cables.
photo of right brake housing:
After a couple weeks of riding I'm happy with the way they've been performing.
It is a bit disappointing that the prime housing does not work as well as aftermarket housing like ilinks, and I will probably just keep using ilinks and buy the powercord cables by themselves unless some improvements are made in how the powercordz perform with the powercordz housing/ferrules.