I tour on my JJ's and they're awesome, 90% of the time. I'm skiing at Whitewater, Nelson BC. So lots of sidecountry access (1/2hr -2 hour skins). On old skin track, especially the sidehilly and steeper terrain they aren't the greatest. But if I'm doing a real tour and breaking trail or fresh skin tracks they're awesome. Keep in mind that most of your traction from your skins comes from the back 2/3's of the ski, so the more rocker you have in the tail, the less skin traction you get. Again, i really only notice this on older, steeper tracks. I think that the rocker/camber combo is gonna effect the skin performance more than reverse sidecut.