Cake. Used Bennetts. Installed them 3 yrs ago and no problems at all to date. Instructions pretty foolproof as well.
Watch where you mount the control switch. I mounted mine to the right of the steering wheel. Looking back, I would mount it to the left so I can work the throttle with my right hand.
The actuators mount differently on every boat. Mine, unfortunately, are under the waterline. Nothing like drilling 2 - 1" holes in your boat. Sealed everything up with 5200 and no leaks at all.
Seal every screw in the transom with 5200. Dont be stingy with it either!! Last thing you want is water intrusion into the transom .