Pros: Free pivot switch, immunity to icing, adjustable,underfoot cable routing, excellent touring ROM
Cons: weight, cable flops around when transporting.
It has a thin plastic skin over nearly every square centimeter of surface area, further reducing the likelihood of snow build up. In particular G3 molded a "horn" under the duckbill so that snow will be shed with each step, instead of packing up into a blob of ice that limits the touring range of motion. The ROM is a solid 50-plus degrees, so it won't inhibit kick turns on a tight switchback.
The power train uses a pair of compression springs routed underfoot, with adjustable pivot points. It is as active as HH#4, or a skosh less than Axl#2, but more than the O1 with rid-stiff springs - or as modest as a Switchback. The climbing post is spring activated making it super easy to flip up, or push back down.
The cost of all these features? About 4 pounds per pair. To be fair, if you want as much power as Enzo provides, at least in the 75mm world, weight seems to be the cost. That and 3 Franklins.
More details at EarnYourTurns.com.