This qualitative analysis examines responses from individuals who completed a robust graduate instructor training program--a guided mentoring forum that meets bi-weekly, beginning the semester prior to the graduate students' first teaching assignment, and continuing through the totality of their teaching experience in graduate school. Current and past participants overall felt well prepared, although some indicated an "okayish" level of preparation. Participants discussed areas needing further preparation: building content, addressing student issues, and receiving formal training regarding the scholarship of teaching and learning. Implications for graduate instructor training based on a forum model are discussed.