Well, your arrow may come off do to having your bow laying in your lap while on stand or could get bumped off of a prong rest by an external source, such as a branch. Many people have had these problems along with problems coming off while shaking in thier boots while drawing. The WB takes away all of those problems. Also, contact on all vanes of equal amount does not seem to cause any tuning problems, I have not cut out bristles on mine to prevent contact, and no problem tuning. With skinning carbons and acc arrows, getting no contact on a prong rest is not an easy task. Do the bristles lose temper and begin to bend and develop memory? Mine sure hasn' t. I' ve been shooting the same rest for two years now, and I shoot a lot, weekly 3-D and in my back yard. Trouble shooting threads, I haven' t seen any? Guess you' ll have to point them out. And after ya do that, I' ll point out the threads where someone had thier arrow fall off when trying to draw on a deer, or the arrow was already off the rest before they drew, but didn' t notice it until at full draw. Who has suggested to replace the bristles at 100 shots. That' s ridiculous, like I said, 2 years and several hundred shots and mine is still as good as new. Use an easy tuneable rest, like what, a drop away? Yeah, just another moving part to malfuntion and make noise. NOT! And on edit, it' s obvious that c903 still hasn' t tried a Whisker Biscuit, and until someone can show on paper that it is what it is, it will always be that way!