Limbsavers work great, though I'd use alpha shox on a Hoyt. Most shock blocking stabilizers also work as advertised, some better on some bows, others better on other bows.

Leeches though.... IMO, leeches are appropriately named... something hyped up to leech a little extra cash out of the pockets of the gullible. I hate leeches - and refer to all the solid rubber silencers as leeches - and for good reason.

Catwhiskers cost practically nothing and, when installed properly, will outlast the bowstring. (Good for knowledgeable shooters, not so good for profit minded businesses!) Catwhiskers work just as well at quieting the string, if not better, than leeches. Catwhiskers are safe. If they do come apart, they just fall into individual strands and scatter on the ground. They won't break off during the shot, ricochet off the bow limb and fly 10 feet - with force - to nail someone else in the eye. (Fortunately, even though it hurt like hell, all I got was a busted blood vessel in the corner of my eye.)

Potentially dangerous product that's also a ripoff... Did I mention I hate leeches? [:'(]