I have sold, setup, and used on my personal bows many drop away rests. I would rate a few in the following order.
1. Vapor Trail Limb Driver
2. Ripcord
3. Drop Zone
4. Trophy Taker
5. QAD
They will all work if setup correctly, but IMHO some are just a little better and much simpler to setup. That determines the order for me.
Dan