Well after listening to all of the positive talk about the STS system I broke down and bought one for my Old Glory. And from the first arrow I new it was $40 well spent, if not the best $40 dollars I had ever spent archery wise. It really does as advertised. It makes your bow more forgiving and quieter. Probably more forgiving than quieter in the case of my Old Glory. Not that extra sims rubber can hurt a bow. I really do think this will be the next "MUST HAVE" for most archers. I would not be surprised to see some bows coming from the factory with STS systems already installed. I really thought my OG already was a tack driver but but now it really stacks the arrows together with the STS installed. I'll take some pics of it and post it. In the meantime you can check out their website at: www.stsarchery.com