Yeah the Hush Kit isn' t bad for someone who doesn' t feel like shelling out extra cash for aftermarket silencing stuff, but the SIMS new Super Leeches are IMO much better than the Hush Kit " Stars"
For some reason depending on the bow they seem to work better than others........my Pro38 Dual Cam was quiter with NOTHING on the string that the Hush Kit silencers because one was loose and buzzing.

If you want a super quiet bow, scrap the " Stars" , and get a pack of Super Leeches. 2 on the string , and 1 on the cable and one on the inside portion of the string. Also slide the Vibrablocks to the limb pockets and get a set of Stealth Limbsavers and place them at the point where the thick end of the limb meets the thin part of the limb taper.
And loose the tube peep!! [X(] You don' t need it with a balanced bowstring like BowTech uses. Try a Tru-Peep " Super Hunter"