Let's just say that Campy is just Campy. Italian at that.
But on a serious note, their groupsets are nice. The EPS stuff is a pain in the ass to setup (compared to Shimano anyway.) Really nice components and shift quality. I like their hoods as they are much more ergonomic compared to Shimano. The Athena 11 speed is not bad and considered the "entry level" of their higher end groups. I have not yet installed an Athena EPS group but a Super Record and Record -
Fun fact: It appears 11-speed cassettes are cross compatible right now.