I thinnk it's a great idea but it's rare to see a prop without some marks on it's edges no matter how careful we are with them. I'd expect teh prop must be made out of glass-filled polycarbonate or a similar engineering type plastic to be anything like rigid enough to transmit power. If that's the case as soon as it picks up a few nicks and scratches it'd saw an arm almost as fast as an alloy prop.
On the plus side - the fat leading edge would definitely cost some efficiency but going by the speed impact of the propguard on my Zapcat, this new prop would probably be way more efficient than a guarded prop.
Of course that's without the slots in the blades which make no sense. You don't see aircraft wings with slots out of their main lift surfaces.