In this issue, Delbanco and colleagues (2) describe the results of a 1-year experiment, OpenNotes, that allowed patients direct access to their primary care providers' electronic progress notes through patient portals. The study involved providers and patients from 3 centers, and many of the participating patients already were users of online portals linking them to their institution's medical record system. Providers and patients were surveyed before and after, and provider responses were compared with those of providers who originally declined to participate. Participating providers were much more positive than nonparticipants about the potential for OpenNotes before the experiment, and concerns that participating physicians voiced at the project's beginning were allayed by the end. Yet, a substantial proportion reported that OpenNotes did influence the content and character of the documentation. Attitudes of patients who used OpenNotes were largely positive, and most believed that having access to the information provided many benefits, including enhanced understanding, improved medication adherence, and a greater sense of control. Privacy was the biggest concern among patients.