We had a wonderful time staying at Simon and Victoria's place. The apartment was clean and located close to the main street with shops and cafés. My wife and I felt safe walking around, even at night, in the neighborhood. It can feel a little "rough around the edges" at times as it seems there is a homeless shelter or some sort of community space on the same street, but we've lived and traveled a lot, and this is how it is in urban areas.
That said, Victoria provided clear, concise communication at all times. She even arranged to have someone drop off a water kettle within 10 minutes after we asked for one. She responded quickly to all questions and helped us enjoy our time in Quebec City! We definitely recommend Simon's place for anyone who wants an affordable, clean place that is close to the action.