I just received the device and was optically reviewing it. Great system to use. Of note, you will need to also purchase a pulley capture device (like the Petzl Maestro or CMC Clutch or MPD) for it to work properly. All of these are also available the Rock-n-Rescue. The device guys the mechanical advantage of a pry bar technique in a lightweight device that allows you to jack a worker back up where you can effectively reach out to secure them.