+1 on what G said, I like the basic auto pilot the best, it goes by direction, not GPS heading.

On advanced auto pilot, it is like you laid down a string when you hit the button, so if the wind blows you off of that imagimary string, the advanced AP starts trying to take you back to that line rather than just going in a set direction....that's a good way to tangle up some crankbaits or jigs IMO