i have the r600s. i loved them until last week. i had a triple century a couple weekends ago and my right knee is all jacked up. i DON'T know that it's the pedal's fault. i have an appointment w/the doctor to find out exactly the problem is but the pain is on the outside of the knee. very sharp occasional pain when i bend the leg and pedal. i'm hoping the pedals didn't do it because they are EXTREMELY easy to clip into. i'm almost always the first guy clipped in because of the design.
btw, if you get them, be prepared to buy a lot of cleats as the rubber wears away quickly. i've only got ~600 miles on mine and they're getting trashed.
btw, if you get them, be prepared to buy a lot of cleats as the rubber wears away quickly. i've only got ~600 miles on mine and they're getting trashed.