I have used the Muzzy rest since they came out many years ago. I have had them on my last 3 Mathews bows including my Switchabck now. I feel they are a great rest, and have never had any problems. A couple of tips I have learned over the years using them. I put 2 mini limb savers on the flat arm that moves up and down. One on each end. They take out any vibration and really make the rest dead silent. Also I always put a NAP arrow holder on my shelf, and it works great.