Advantages: Can use a hard helical with small carbons, less chance of fletch contact with any shaft, some reduction in torque, can be more forgiving due to the reduction.
Disadvantages: adding something else that could go wrong such as the cord coming loose, etc. Some models might have a little more noise, take a little more time to get setup with the timing, etc.
Some Good models: I like the Golden Premier Fall Away for targets & 3-D, The Mirage or Power Drop for hunting. Some other good models that have a strong following but I have not tried are the Trophy Taker, Muzzy Zero Affect, and the new Mathews Fall Aways.
I' ll be more than glad to help you out with any questions you have on the Golden Key Futura products. just send me a PM or e-mail, also go to
www.goldenkeyarchery.com