What brand TM is it ? What brand fish finders will you run?
Lowrance interfaces with motorguide and lowrance , Humminbird with humminbird and garmin with garmin.

once you have waypoints entered on your fish finder, you can go to that point with your fish finder, Just get close and tell the FF to navigate to the point,
the trolling motor will take you there and keep you in position,

it is the greatest thing since sliced bread.

How much you use it depends on your fishing style, more than 90% of my fishing is over brushpiles,
So I use mine all the time

Your mileage may vay
MO