If you're looking for a quiet place in a beautiful residential neighborhood that has easy access to more bustling parts of the city, I highly recommend Cenk's apartment. I had a wonderful stay, and would gladly stay again.
Here are some more specifics about the place:
(1) It's a very clean, well appointed, and well-lit basement apartment. It's heated by radiant heat (from the floor), and stays pleasantly cool even when it's hot outside. There are windows that let in air and light, but they face the sidewalk in front of the building so I didn't feel comfortable keeping them open most of the time I was there.
(2) There's free street parking right next to the apartment, but take seriously the signs that parking is limited to four hours---I got a rather large ticket for parking overnight there. (You can park for an unlimited amount of time a couple blocks up the hill, on Chemin de la Cote St. Antoine.)
(3) If you're over 6'3, you will bump your head in the shower. I'm just over 6' and it was fine for me.
(4) All the cafes I visited on Victoria (a 10 minute walk from the apartment) are delightful, and have outdoor seating available. There's also a Metro supermarket there.
(5) If you're a light sleeper, consider bringing a sound machine---every time someone walks up or down the stairs in the apartment above, you'll hear the stairs creaking pretty loudly.
Overall, this is a great place to stay, and Cenk and Esra were excellent hosts. Highly recommended.