Pros: Adds no weight to the bike and is easy to install. Cons: Bought this for use with a Burley trailer. It works somewhat, but leaves a lot to be desired. The Burley trailer hitch interferes with the Mudshield so it can't rotate. The plastic is too flimsy. It does not block all the spray the wheels kick up. I'd prefer some solution that modifies/replaces the existing rear tire shield and feels more permanent, and blocks more of the spray.