I was having issues with the plastic mounts on the heel piece of the vipecs. sometimes when I put them to the steeper climb mode they would come off their hinge. other than that, and some fumbling to get the toe piece locked once and awhile, I really like them. def bomber on the descend. I use them at whiteface at times and they hold up at speed and even in bumps.
I would like one more setting on the heel for steep climbs. the third setting on the old free rides I could climb up the steep choke points on trails like Lake Arnold or towards the top of Algonquin before leaving tree line without the issues some of my friends had w/ their dynfitt.
I ride with Crazy Horse!