I thought about getting one for trolling but found out that I'm well within tollerance. It's only nessessary if you are throwing out above or beyond these tollerances.Originally posted by dmonwai:<br /> I think it helps. <br /><br />But its just a tool, its not going to get you fish anytime or all the time.<br /><br />I like it because it stabilizes and controls the voltage on the downrigger cable.