Gilles' place is an excellent choice for a stay in Montreal. The space is well-arranged and comfortable while providing you with everything needed for a long stay. There's a clear hospitality-driven approach to the setup with clear instructions provided to the guest. Anyone with a real steam iron and an actual ironing board (none of that tabletop s**t) earns my respect.
On top of the host being helpful and responsive, the apartment is at a great location (cafes, pharmacies, groceries, restaurants, bakeries, and the subway - all within a walking distance).
During my six weeks of stay, I never ran into issues with the internet connection, the apartment was clean, and my needs were well-met. I could have easily stayed another six weeks if it wasn't time for me to go.
One note on the floorboards: they do creak quite a bit so that might be a consideration if that sort of thing bothers you. On the other hand, it can add a rustic charm to your visit.
I highly recommend this place.