It has always been, for me, a source of amusement that Campy adopted and has clung to two features found only on Shimano's bottom line components. The little thumb button to shift, as found on Sora shifters, and the lever mounted, push-button brake QR, found on Exage components from the '80's.

The caliper mounted cam-type QR is so handy and useful, not to mention Tulio himself invented the bloody thing, that I found it sacrilegious when Campy first omitted it. The thumb button is just bizarre. If I have to move my hand from its normal position simply to effect a shift, then nothing about the design is ergonomic, no matter how much Campy insists it is....

Sram would be great if only they could eliminate the lost motion in the levers (Red is getting better in this regard) and build the parts so they have less slop. When an old Schwinn Volare with 1st Gen Dura Ace like the one in for an overhaul right now has less slop in the derailleurs than brand new RED parts, it doesn't bode well for durability.