I have to admit that I was a big proponent of the STS system, or at least my version of it, after it first debuted. JoePa even came up to the shop and shot the bow I had it installed on. My '05 Old Glory with it installed was extremely quiet and I thought it reduced some vibration in the bow as well. After several weeks of shooting with it though I removed mine and, to be honest, I really did not notice much of a difference with it off in terms of vibration or noise level. I have not put it back on since.