I put a relatively small dent in my pipe this past weekend, so I began to think about purchaing a pipe guard. I tend to ride in the nastiest rock gardens on the entire east coast, so more dents are likely. First and foremost, do PipeGurads really work ?? If they work only partially, are they worth the investment for the amount of protection they provide ? I've narrowed my selection down to 2 brands: Maier vs. Moose. The Maier is $10 cheaper at $30, but there is no information about the product. The Moose claims their guards are 3mm thick, and they are the thickest in the industry. Has anyone had experience with eithe of these products ?