I use WinnersChoice and have been very happy with them. Their servings, especially around the cam hasen't moved a hair. I had two different cables on my bow within a week, both servings slipped after a dozen shots. My WC cable and string have a ton of shots on them with no sign of slippage. They do not add any vibration to my set up. Maybe if you make your own strings you have more control over quality, but if you buy them in an archery shop I think WC is money well spent.