I have tried both Crud and SKS Raceblade fenders with mixed results. Cruds look better and are more effective -- IF you can get them to fit without rubbing. That's a pretty big IF, and I wasn't able to make them work on my bikes without rubbing the tires. Raceblades are less effective at blocking water and look kind of graceless, but you can adjust them so they don't rub your tires. The best solution, IMHO, is to buy a bike/frame with eyelets and clearance for fenders if you ride in the rain a lot.