Had one on my commercial
15m Cougar Cat for 10 years still going strong when I sold the boat
in 2014. Also have experience with another on a 35m commercial cruise ship
. It worked well, even in the extreme tides found in the Kimberly, Australia
. Good units & simple to use.
One thing to watch out for though is there is a very small fuse (0.25A I think) on a circuit board inside the case. If the auto pilot stops for some unknown reason check this fuse.