I stayed at Alex's place for 3 nights about 2 weeks ago.
The location was extremely convenient. It was about a 15 minute walk to most of old Quebec and about 18-20 minutes to the outer parts such as the port or Place Royale. The walk to Old Quebec was mostly uphill, so be warned if you have issues with walking. It was only about an 8 minute walk to the Saint-Roche neighborhood and was mostly downhill.
Parking was not the greatest, but that was made known in advanced. There are a few municipal lots and garages within a 6 minute minute walk and run about $14 to $20 CAD for a full day. I chose to park in the Dorchester lot. There is street parking in the streets around the apartment, but that was hard to come by and is only free for select hours as specified by road signs. There was no parking on the road in front of the apartment. I'm not sure if that is due to the construction or if it is always that way.
The apartment is on a busy street, but I did not have a problem with noise until the construction started in the morning on the weekday.
The apartment was extremely clean and included the amenities that you need such as body wash, shampoo, and coffee.
Alex was a pleasure to deal with and answered any questions I had within only a couple of minutes.