I stayed here for 3 months and the apartment was clean and tastefully decorated. It's located just 2 minutes from the metro and has all the amenities you would need up and down the street. Despite it being the start of winter, the street was sufficiently busy with activity. That said, since the room was at the back of the apartment away from the street, it never got too noisy. The room was cosy and had good natural lighting during the daytime.
Daniel is an excellent host (and Babou the cat!) who is incredibly accommodating and friendly, while still respecting your personal space in the apartment. He has many stories to share so do spend time just having a chat - there's a lot you can learn from him about the city. He will offer what he can to make your stay comfortable and I couldn't have asked for a better place to stay at for my first time in Montreal. If you want to practice your French, Daniel speaks really clearly and in any case is perfectly bilingual in English.