We stayed 2 days here with my wife for a short trip to Montreal.
Carol's place is great. There is a queen bed, working desk and your own private living room. The place has a great cozy design. It is just as described. You have your own door to the apartment. Kitchen and bathroom is shared with Carol.
His apartment is at a very central location. 5 minutes walk to the Berri station. Very good starting point for discovering the city.
You can find many drinking and dining options within a short walk.
I'd stay there again.