I have a Minnkota Ulterra on a 27Rambo, and as has already been said by Bryce and Rick, it's a game changer. As your pulling up on a piece, you deploy, and hit spot lock once your over it, turn around and start fishing. Not enough life? Hit Stow and be on your way in literally seconds. Makes it quick and easy to bounce around to many more pieces.
You want to move a little to get on it better? With the heading sensor, you can jog the boat 5' at a time forward, back, left or right.
Got a bad drift with wind against, or across the tide? With the heading sensor, use the auto pilot to counteract the wind drift and just go with the tide. Or if you have no drift at all, make one for yourself, controlling direction and speed.
The motor runs off 3 deep cycle marine batteries, that are charged from a built in battery charger i plug in when im back home. It doesn't charge off the motor. Supposedly I could get a pair of lithium batteries that could be charged off the motor, but it's beaucoup bucks for the batteries, and these work fine for a full day. A full charge has lasted me all day blackfish fishing.
I do have issues with the spot lock "slipping" position in heavy current, like 1.5-1.75 knots or more. I'll raise the outboard out of the water to reduce drag. My trolling motor has 112-lbs of thrust. Go with the biggest motor you can to avoid this problem. Coming out of the water in rough water is also a way to cause it to slip back, or shut off completely.
If i had Humminbird electronics i could integrate it with my helm.
We have affectionately named it "Johnny 5" from the movie Short Circuit. I think my crew loves it more than me, for saving them from pulling 2 anchors all the time ? Here I was using it to make a drift while tile fishing. My buddy Joe was quite relaxed as you can see lol.