Research studies investigating the acceptance of information systems mostly focused on systems designed for long-term use without considering systems designed for one-time or short-term use. However, systems designed for short-term use are part of the health information technology portfolio. We propose a theoretical model inspired by the D&M IS success model to investigate user satisfaction, as a measure of acceptance, with a web-based decision aid designed for short-term use to support “goals of care” decision-makers. We hypothesize that media richness, perceived social presence, and trust affect system quality and information quality, which affects user satisfaction and implementation outcomes. We propose a mixed-methods study to test our hypotheses using eye-tracking, surveys, and interviews.