We had a nice stay at Vincent's place. The things we liked the most:
1) It's in a good central location. ~10 min walk to Old Quebec, not much farther to St Jean, St Roch, and Cartier St (great areas with tons of food options). The AirBnB is on a street with lots of restaurants that didn't appeal to us personally, but might to others.
2) The AirBnB is probably due for some updates soon, but everything was functional and clean. We slept great in the bed and the AC worked (a plus in the summer).
We also liked the binder with recs and the guidebooks that were made available.