In our opinion, this was a very good place to stay in Quebec City. The hosts are very helpful and responsive to questions and also pleasant and professional to deal with. The apartment is easy to access, is updated and clean and has good internet. The unit is sparsely furnished as you see in the photos but comfortable and reasonably quiet.
We love to walk, and did up to 30k steps most days, so take that into account when you read this. However, we followed the numerous routes to the old city, to breweries and to a very nice indoor market to the north of us, and criss/crossed the whole area on foot: I am guessing that one could see the old town in about 10k steps a day taking the direct routes. The old city is really quite compact, and this apartment is within about 350 meters of the closest point of the Unesco designated area, and the closest point of the ancient wall is about 1 km or 1200 steps.
This apartment is so easy to find on the map as it is between 2 major arteries that show in bright color on all of the maps we used. It gave us easy access to the old city and to many very good micro breweries, two of which are only about a block or 2 away from the Theatre Lofts. There is a decent grocery store about a block away and a very large one about 3 blocks away. There are 2 good coffee shop nearby(one 30 steps from our front door, and there are other good shops on the next block such as Cachon Nation for fresh sausages, and a wonderful bakery called La Boite a Pain/Box of Bread: :quite fabulous.
We felt safe in the area day and night, even though there were some street-dwellers around: we found them harmless and pleasant. The area is also busy with foot traffic at all times of the day and evening, so we were not alone.
Some have mentioned the construction on the street, but it was not a problem. We didn't use a car, can't attest to the parking in the area, but wow-the bus system was so easy, cheap and convenient. We hopped onto the #80 right outside of the airport door-closer than the taxi stand, and we were dropped on at the end of our street, 5 steps from the front door of the apartment. We walked about 150 steps an hopped on the #800 and rode it to Montmorency falls for $3.50 each way.
The only negative we have to say is that we were a little too early to do some activities in town(first week in May) as, for some reason, Quebec City is still on winter hours until June (the 24th to be exact). Still, we have a great time.
There is really too much to say, but I will add: take the ferry from lower old town across to the city of Levi for $3.85 to walk on, and go to the Corsaire Microbrasserie/Pirate Microbrewery, a few steps from the ferry terminal-it is really good.