I took one that had the SCS clutch out for a test ride, but I couldn't get on with it. I'll often slip the clutch when I ride - for example if I'm turning at a slow speeds - and I didn't know how to do this with the SCS - there's a clutch lever, but the bike really wasn't happy if you tried to use to disengage the clutch a notch or two. Also, I didn't think it did the job so much better than the quickshifter (which comes as standard on the base model) does; it works works really well, up and down, even goes from 1st to 2nd. Finally, the SCS bike comes with a handbrake, which you have to use to keep it stopped. And that point I began to wonder whether it was a solution that was way more complicated than the problem it was trying to solve. I know some people love theirs, but it wasn't for me.