Anybody have any experience with these? With Campy drivetrain? I can get a smoking deal on a set, but I've read some reviews that say the shifting is sub-par, and the chain has a tendency to drop off with downshifting. The main advantage of these over my current Records, is my Records are...

I'm selling my PowerCranks for $899 OBO (that is the same price as the basic model through the powercranks.com website). The PowerCranks I'm selling come with the following: X-Lite Version (much lighter than the regular version). Adjustable Crank Arm Length (simply change from 172.5 to 175...