Hey,
I installed the EV100 kit on my boat back in 2014. the kit includes the drive unit, the course computer, the display / control unit, and some wiring. The install if fairly simple. If you have a NMEA2000 or Seatalk NG network it's super to get all the instruments and devices talking.
Here is my brief review of the unit as installed on my C&C 110.
Pros:
-Affordable. I paid around $1100. The unit goes on sale all the time. I'm sure it will be around that price on Defender when they have their big spring sale.
-Relatively easy to install (especially as compared to a below deck pilot - which I'm sure would work better).
-Easy to integrate with other electronics (I have connected mine to a Garmin plotter, A B&G plotter, a Simrad VHF)
-The display unit is super cool. You can select from various screens. I use screen for general use, another when racing (I can use the pilot when racing single or double handed) and a third when cruising to a destination.
-Fully featured - you can go to a heading, steer to a wind angle (if connected to a wind instrument), a waypoint, or follow a route. It will autotack.
Cons:
-Performance is good but not great. For motoring in calm seas it's fantastic. For sailing in moderate conditions it works very well. For sailing UPWIND in big air it works fine too. For sailing downwind in good breeze / or if the seas are up the performance suffers. Not that I am not complaining. I don't expect a wheel pilot to work well in big seas downwind.
-The pilot can be loud. The wheel tends to squeak which can get annoying.
-And the biggest con is that the lever to engage the pilot WILL eventually tend to unlock. This is a common problem that seems to happen to everyone. I (like many people) use a small bungy cord to keep the lever down.
All in all I am happy with my unit and I do recommend it.
Barry