Our family (parents and two girls aged 8 and 9) stayed here for two nights and would highly recommend the accommodation for anyone coming to Quebec City.
The house is in an ideal location - close enough to the walled old town (about a 15 min walk to Frontenac), but far enough from the tourist zone that there was zero noise at night. There were plenty of shopping and dining options nearby.
The house was clean, the beds were comfortable, and Christian was very helpful and informative. We also enjoyed sitting on the balcony.
Be aware that there are two steep flights of stairs - wasn't an issue for us but folks with mobility issues may want to keep that in mind.