I havent had any problems with my ZigZag or my rope.Im using and older Tachyon, thats really broken in-if that matters.
I havent noticed any discoloration,wear or burs on my ZigZag.Ive only used it Ddrt and with a pulley saver.I actually almost used it in a V rig set-up but honestly I got a little scared too. I really wanted to try it with a wrench and or Velocity,but due to the smaller diameter im gonna pass. I dont wanna use it with the wrench because I dont wanna go outside the Petzl recommendations and then damage it or something.
Its a good tool so far and I really like decending on it more than the spiderjack,It just doesnt self tend as well,so I been using my spiderjack alot more.Will see if it last,I hope so it wasnt cheap.