This place is charming and cozy. It is about a half-hour walk into the old port area (we went in winter and there was a lot of snow/ice). If you don't mind A LOT of steps, you can walk up to Old Quebec, but I recommend the funicular that you can access in the old port area. I DO recommend the toboggan ride there as well.
Regarding the rental, be aware it is not a spanking-new place. For example, as it has shifted over time, the bathroom door no longer fits in the jam and cannot be closed. Not a big deal for us as a couple, but it may be for other people.
We appreciated the croissants and milk left in the fridge for us and the easy check-in/check-out.