anyone have any experience with these yet?

I have used one of these props for  about 6 months. I use a M.K. trolling motor 44lb. thrust for primary power on a 15'4" Gheenoe and the Kipawa prop has given me more speed . Acceleration is a bit slower than the standard M.K. prop,but it seems to be as durable and weedless as the  prop that came with the motor. My impression is that the Kipawa has a-bit more pitch that makes it speedier on small light boats. How it would perform on a heavy bass boat etc.is something I can only speculate about and I would say that  heavy boats would do better with a standard prop. Hope this helps.