Electronic resources are a growing property in academic library systems. The “hybrid” model is characterized by a strong presence of digital resources and services joining or substituting books, paper journals and the traditional methods of bibliographic research. The shift from a traditional to a hybrid library system requires important financial investments, so the analysis and the monitoring of the service supply has a particular meaning in this sense. The Library Management performed two surveys on electronic resource usage and evaluation after the experience of scholars and academic researchers. The article presents the results and analysis for the years 2001 and 2002