LibQUAL+® is a suite of services that libraries use to solicit, track, understand, and act upon users’ opinions of service quality. These services are offered to the library community by the Association of Research Libraries (ARL). The program’s centerpiece is a rigorously tested Web-based survey paired with training that helps libraries assess and improve library services, change organizational culture, and market the library. The survey instrument measures library users’ minimum, perceived, and desired service levels of service quality across three dimensions: Affect of Service, Information Control, and Library as Place.