Just ordered the Kiwi Prop for our Beneteau 343. We have pretty bad prop-walk, so I'm hoping to get cured on that. Also, in 10-12 knots of wind, I usually make a little over 4 knots SOG with my fixed 3 blad prop. People have called my fixed prop the equivalent of a bucket being towed behind us
Will report on our experience when I get Jendai back in 2 weeks after our haul-out.