Hi Trickydownunder,
I've got this exact same model and I'm not completely satisfied by it. First, it's a pain to mount unless you have a really small L-shape torx screwdriver because one the two screws (not the one you see in the picture) is of difficult access with very little space to screw it. Plus, the fixation goes on a screw that seems important (don't really know how to explain it but it's like between the arm of the rear wheel and the rest of the scooter) so you want to be sure it's properly screwed. But maybe for someone with better tools and skills than me it's easier...
Then, I don't feel it's that useful, sure it blocks some water and dirt but were it a bit longer it'd be much more efficient.
The only thing is that it's the only model that exists for our scooter apart from a carbon one (from Wunderlich I think it was) that I remember was super expensive...
I hope that helps!