I'm not sure what sort of problems you could have from a chaingaurd. Even though it may appear to be a "thin" plastic, mine seems to be holding up well (so far only 350 miles on it). I haven't removed it to clean under it yet, so who knows it may be one of those parts that is never the "same" once you take it off and re-install it.

I could possibly see it being a problem if you smashed it into something, but I love how clean it keeps the chain, and my calf/pants legs. I really wish more manufatures would take a card out of Joe Breeze's deck and start putting some sort of chain guard back on "commuter" influenced bikes.

Ma Breezer is like butta'