I have only used them a few times, but i have caught a few fish on them. You still need to put a leader on there with a swivel (about 6' should do) and run about 25' of line out of the side planer-it really depends how much room you have though. The planer will slide down to your swivel when you have a fish on. I have used them on the Deschutes where we had a ton of line out and i have used them on the Necan where you did not have much room. I am not sure if there is a standard though.

Crayfin