I just changed my string/cable to a Vapor Trail made out of the new VTX material, and with over 2000 shots on it now, I can honestly say that it hasn't stretched a bit since I did the initial peep install on it. The peep aligns perfectly every time since it was installed, which was before the string was allowed to have the initial "break in" stretch period. There was absolutely no stretch during this break in period. I am sold on this new material, and will be buying their strings in the future.