Habits, I have a riptide 70 lb with auto and co pilot. This works off of a compass heading, so if you blow off course it will correct and bring you back to that heading. My understanding of the gPS setup is that it will do it's best to return you to the track it was previously programmed on, whereas the compass will just point to the same direction, though it may be a few feet off of the original track but parallel and going the same way. I've used mine trolling for countless hours and love mine but I would buy an I-Pilot next time without hesitation. Mine has less bells and whistles but still does a good job for me.