I have been running a MK Ulterra with I pilot only because I've had a Lowrance unit. I just bought a Hummin Bird Solix 10 and an I pilot link for my Ulterra. Yesterday was the first day on the water. Some things were a little difficult because I wasn't used to the new remote and how it functions.
All in all I was very pleased with it. The follow the contour is a very nice option. I have spent most of today researching and asking questions on MK and HB forums so I have set some things up and have a better understanding of the operation of the two units. I am going back tomorrow and try to put my new knowledge to good use.