I put one on my Patriot and wouldn't be without it. It allowed me to remove the string silencers without gaining any noise.
I even tried placing them back on the string one at a time & it didn't make a difference.
The string I had on the bow throughout deer season had a served area where the STS hit, so there was now where. It's current string does not, but if it stays I'll serve it later.

BTW a friend recently installed an STS on a new hoyt TRYKON & it eliminated the string buzz I've been reading about & heard first hand.