I have 2 of the Muzzy zero effects for a bow with a cable guard and it is all you would want in a rest. I also have a Muzzy for an Outback with the roller guard and it leaves a lot to be desired. It has some shock when shot, if you let your pinky wander on the shot OUCH[:'(] and the cable attachment makes a slapping noise when shot. The arm that attaches to the cable torques badly when drawn. I e-mailled Muzzy about these issues and the tech I talked to said they were aware of these concerns and they were looking at them. I got the feeling if the rest keeps selling, there won't be much done. I noticed a picture of the rest at an archery store on the net and it looked different. Has anyone purchased one recently that could shed some light on any updates. Don