This place is perfect for a long term stay. I lived at Mathieu & Martin's for 3 months and I felt like it was my home. It's ideal for one or two people; It's cozy; it has all the amenities (dishes, cleaning supplies, bed sheets, washing machine and a dryer, laundry detergent and so on). The place is 1 minute away from the bus stop for #24 which goes all the way to the center of the city (passing Univesité McGill and Musée des Beaux Arts de Montréal).
Marthieu & Martin are extremely nice people. They responded to questions right away and helped me out when I needed it. If I come to Montréal again I would love to stay at Mathieu & Martin's again.