Search on here and you will find a lot. In a nutshell, in current or wind it will hold you well. On still water it will fight itself and bounce you all over a small area, never settling in - my experience on a DLV238. When trolling @ 1.5 ish mph it can randomly ramp up to full speed. Heading hold while trolling is great and except for the random "ramp up" the cruise function works well. I have not networked in into the HDS yet so no info on the point A to point B. So it has some quirks, but I'm not ready to trade it..