I've got the same brand of bash guard as the one you're looking at ReadyShreddy, although mine's for a Gen2 Levo and has a lot more air / drainage holes in it. I fitted mine after losing most of the motor casing to a log strike on a night ride and discovering that the replacement bit of plastic cost about £60 and the only place I could find it online was a retailer in Italy! Since fitting the bash guard I've not had any problems. It uses a slightly longer bolt which can be fiddly to get everything aligned, but then I never remove my battery anyway, so it's been fit and forget. The velcro bits securing the rear of the guard have been very secure and survived 3 pretty gruesome Scottish winters without complaint so far. It's also saved me from having to shell out stupid amounts of money for replacement bits of flimsy plastic. On one notable night ride my mates were even treated to a cool sparkly show when I gouged a deep score on the bash guard as I dropped down through a rock garden. That alone made it a worthwhile purchase!
Beagleboy