Pros: Comfort with performance, easy on-off
Cons: none so far
I purchased these at the Boot Doctors in Taos to replace a pair of ancient Tecnica TNS boots. My feet are "beat up and gnarley" (one extra large ankle bone, "B" width, high instep, flat arches) and thus hard to fit. After working with the fitter, including new foot beds and adjusting the "heat conformable" liners, foot nirvana was achieved. I've skied the boots about twenty times: no complaints, whatsoever, and definitely a performance bonus. Like a good umpire, once ski boots are fitted and broken in they should almost disappear from consciousness. These do. The Atomic "whiz-bang" specifications are here, for whatever they're worth: http://www.atomicsnow.com/en/ProductFinder.aspx/#/alpine/alpine_boots/5/all_mountain/ae5000040/hawx_100
Two added points: I could not discern any difference in flex between the 110 and 100, so I chose the black over the red shell. And there can be no doubt that having the Hawx tweaked by a pro was more than worth the money.
Bottom line: total satisfaction, for me.