Yes. Do it now. Nothing since the chart plotter has influenced my fishing more.
I had a Terrova on my last boat and my new (used) boat came with one. I just replaced it with an Ulterra.
I set my kicker straight ahead slightly slower than i want to go and set the electric to about 40% . I set the auto pilot, then make all steering changes with the remote.
If you are buying used, Minnkota changed the model in 2018 I believe to a Bluetooth model. While the Bluetooth feature is nice (Anyone on the boat with the ap can control the boat with their phone) they are also more accurate and easier to stow and deploy.
The only time I have had any trouble with the system is when trolling for musky over 4 mph, the motor cant keep up.
Good luck.
Brian