Explores a user-centered approach to evaluating the Web search engine Inquirus. Inquirus was rated highly by users on various usability measures; all users experienced some level of shift/change in their information problem, information seeking, and personal knowledge due to their Inquirus interaction; and different users experienced different levels of change/shift; and the search measure precision did not correlate with other user-based measures. (Contains 37 references.) (AEF)