I had some Crud fenders for a while but sold them. They work OK with skinny tires (23 mm or less) but are a pain with anything larger. Since my commuter bikes all have 25-28 mm tires, I couldn't get the Crud fenders to fit without rubbing my tires. The bike I was using them on (Merckx Corsa) also had very tight clearances under the brake calipers, which didn't help matters. I also didn't like the method of attachment at the brake bridge/calipers -- zip ties, which I could never get centered properly on my frame.