I installed a Marine Kinetix
last summer on a customers 53' sailboat and was very pleased with it. It is very quiet, barely audible in the center cockpit
at 15 knots, light-weight and rectified at the controller for smaller GA wire runs..
I paired it with a Kato pole and as far as I was able to record
it performs to the numbers Jeff said it would. When new the cut-in speed was about 10 knots but as the bearings got broken in I regularly saw it spinning up in 6-7 knots.
Jeff was also excellent to deal with. My only gripe would be that the controller I used (I needed it fully programmable) uses thumb twist fasteners for the wire connections.
All in all I was really happy with it, as was the customer, and Jeff was great to deal with..