I would also vote for catwhiskers as the best silencing for the money. The newer leeches are much better than the older ones, but they still can break off. As far as the STS goes, I guess I have strange ears, or am one of the few who is not all that impressed. I initially thought it did a pretty good job, but recent experience calls that into question. I put the STS on my Darton Tundra, and it is the only bow I have that I can use it on, since I got the rear mount unit. I will say that the STS eliminated the vibration, though my stabilizer combo already got rid of most of that. Other than that, the only real benefit I can see is the elimination of string/arm slap with heavier clothing. I have tried setting the STS right on the string, to 1/4" away. There is still a significant slap when the bow is shot. When I had catwhiskers on the string, it was tough to tell whether the bow was any quieter with the STS, it just made a different noise. I tried taking the catwhiskers off like many have suggested. The bow right now, IMO, is too loud to hunt with. It was very quiet with nothing more than catwhiskers and no STS, so at least for my bow, the STS is no where close to the effectiveness of $1-2 catwhiskers. The bow may be a tad faster, but any difference in speed between any of the 3 products mentioned is pretty much irrelevant to me. Personally, if the bow is too loud, I would try the most cost effective method first.