I'm still not buying until they start releasing 'fractional' chainrings and cogs. How many times have you wished "I need a gear JUST between my 52x13 and 52x12"? Well, when they start releasing fractional cogs, you could just shift to the 52x12.5 and be good to go. Of course, you would need the special chain with the fractional links, not only would you have to watch chainangle, but also make sure that you don't have any Prime x Prime chainring/cog combinations, but what's that. Imagine, any gear you would ever want, and under 20 pounds. <of course, that's just the weight of the drive system, not counting accessories like a frame, wheels, rims, seats, stems, handlebars and other options>
Steve
Who sometimes amuses himself