I cannot comment on the Muzzy Zero Effect. I have not used one. However, the Trophy Ridge Drop Zone is one awesome rest. I too was not fond of their products, (sights in particular), but decided to put the DZ on my Liberty anyways. First of all, it is by far one of the quietest rests on the market. And b/c I only bow hunt (no 3d or targets), this was top priority for me. Second, it was easy to set up and tune. It also drops the arm vertically which gives it better fletching clearance than some of the others, IMO.