When I first got my Mathews Switchback 6 years ago, the stock string on it wouldn't allow the peep to align up. They installed one of those peeps with the rubber tubing. I heard some war stories about that rubber tube snapping off and waking people in the eye!!
So I took the plunge and went with a complete "Winner's Choice" string and cable system. That and a Shur-ez peep and I was good to go!! It has held up very well over the years. I don't shoot 3-D, so the amount of shooting I do compared to target shooters in minimal. I also think that it's a better quality string as well.