Trolling motor aftermarket prop?

[humdinger]

Ive got a older johnson (OMC) trolling motor that works great but it's time for a new prop. A new replacement is $40.00+. I was just wondering if anyone has tried a Kipawa, or Young's die cast, aftermarket prop. They claim to be weedless and to give better performance. They are also a little cheaper. Any experience with these or others? Thanks!!