Had a wonderful time staying here in Quebec. I visited in January and the room was kept warm. The kitchen was equipped well, enough for a solo traveler like myself for sure. The bed was fairly comfortable, not the fluffiest or anything but I got a good night's sleep!
The location is easy to find. Do be aware that there are multiple St. Joseph Lofts locations; but the address is marked clearly, so, you shouldn't have any trouble finding the correct entrance.
The neighborhood is an easy walk from the train station, and Old Quebec is also quite walkable from it. (I think my longest trek was 25 mins from my door to a district in Old Quebec). There is a good grocery store nearby that is open late, and the street itself has a lot of good food options. I would recommend bringing earplugs if you're a light sleeper. Seems to be a bar district, some infrequent drunken screaming happened but nothing that was scary or unsafe, just loud. Overall good experience, would recommend it to a friend.