The location is fantastic, right in the heart of the older, walled part of Quebec City. Heat worked great--and it was -20 C while we were there, very cold! Everything worked fine and the rental is pretty much as expected. Beds are basic but comfortable enough. The rooms are all very uniquely shaped. The stairs inside (going from the main floor to the bedrooms) are crooked and uneven.
Other reviewers have commented on the stairs, and they are a serious consideration for guests to decide if the rental is a good choice for them. The stairs are somewhat protected from the elements, but still had snow on them for our visit. They are wooden, and are only steps, no backs; it is quite possible to slip your foot through. There are many of them, too.
Also, the entrance to the stairs is slightly downhill, and one of our party slipped and fell going in. Quebec City just lives with the cold, and there was ice and frozen slush everywhere during our visit (in late February).