The first thing that potential customers always see with any autopilot
sales & marketing
info is the display. The next thing you are "hit" with is all of the bells and whistles. Truth is that with the ubiquitous microprocessor any number of bells and whistles can be added via software
to the point of confusion.
What are you going to use the autopilot for? If you are merely keeping a course in protected waters any "toy" autopilot such as the one you are considering will probably work. If you are going offshore
you need POWER available in both the electric
drive control unit as well as the actuator. You will only find medium and high power available in the electro-hydraulic units. Linear drive
units are lower in power, in general. The one that you are considering is less than 50Watts rating. That is way less than one tenth of a horsepower. For offshore
control a vessel of your size would need a quarter of a horsepower, minimum, in my opinion, especially when considering that with a heavy following sea at reasonable speed the power developed must not only rapidly turn the rudder
in order to avoid an excessive yaw (and a potential knock-down) it must overcome the friction of having to "backdrive" the cable steering
So, if you are going offshore, at least buy an autopilot system having a power unit capable of driving a higher power pumpset even if you don't initially install one. I don't believe that the one that you are considering is capable of doing that.