Why isn’t my OPAC as nice as yours?

Okay, maybe it is a bit unfair to line up any OPAC against the “first fully faceted public OPAC”, as Steve Papa calls it. The left image is a screenshot of the rather shabby OPAC of the library at the University in Magdeburg and the left the newly set-up OPAC of the North Carolina State University. It is a pleasure to browse, search, and modify your search terms. It even tells me in which floor i would find the book. Pure luxury.