This post had me curious and worried as I just purchased a Bowtech Allegiance. So I did some research on Sims String Leeches to compare them to the Bowtech Hush kit. I found that the sims tech support department recomends replacing the leeches every 300-500 shots...that's about the same if not worse than the Hush kit. In my opinion it's a horse a piece. When my hush kit goes to heck I might just try those leeches and then keep buying which ever one does the best job at silencing my bow (which is of utmost importance to me). Good shooting