I always replace stock strings and cables. I guess I'm just spoiled from shooting the strings I make. I bought a new bow last week and I took the stock string off and it was 1/2" longer then specs, and the bow had never been shot. Cables were both 3/8" too long. I was told these were premium strings. I have a different opinion. A friend bought a bow from the same mfg about a week earlier, and he left the stock string on. His peep ended up in a different position after practically every shot. This was on a $700 bow. He now has a new string and cable that I made. Problems solved. I suppose a few mfgs are supplying decent strings, but I haven't run into one.