Background: Recent advances in research on patient experiences with cancer underscore the importance of proactively seeking feedback from users of cancer care services. Methods: The present study administered the Ambulatory Oncology Patient Satisfaction Survey (AOPSS) with 7,885 questionnaire packets mailed out to potential participants. 3,279 completed surveys were returned and 692 of these contained feedback to an open-ended question about patients’ perceptions of the cancer care they had received within the last 6 months since diagnosis. Results: Using the Cancer Experience Measurement Framework (CEMF) to guide the in-depth thematic analysis of patient feedback, 19 key themes emerged, some of which include: treatment setting, time, location, service availability, perceived appropriateness, personnel or specialists involved, patient preferences, information/education, continuity/transition of care, coordination of care, access to care, wait times, access to emergency rooms, and intensive care unit visits. Conclusions: Findings suggest that patient’s dissatisfaction is heightened in settings high in perceived disorganization. Participants suggest that improving wait times in both ambulatory and emergency settings, in addition to ensuring smooth access and coordination of care both intra- and inter-organization cancer care services across the illness trajectory is necessary for creating a more person-centred care experience. These findings are timely as they underscore how informative patient voices are to ensure that cancer settings provide quality, timely, and personalized care that patients have come to expect.