i.j3628851wrote a review of Ergon GP1 Pro Racing Grip - Leichtbau on July 6, 2010
These grips do everything they claim they are supposed to do. They take the weight off your wrists and distribute the weight across a wider area to make for a more comfy ride. The only complaint I have is they don't fit all that well, they are oversized, so they tend to wear on my carbon monkeylites in an odd way. It may just be worth it for the ease of cleaning, comfort of use and longevity. I only have 100 miles on them thus far but they still look new!