We stayed in this apartment for about 6 weeks in the summer of 2019. Biggest plus is a washer and dryer INSIDE the apartment. This is a huge plus if you are staying for any moderate length of time and should not be underestimated. Also a TV with Netflix and local channels. We also cook a lot and found the cooking utensils, oven and stove to be great. The fridge is also a full-sized fridge and freezer so we never had any problems fitting our groceries inside. The apartment is located kind of halfway into the basement but there is a lot of light from a sliding door window so we never felt like there was not a lot of light. There are also a number of beautiful wildflowers and wild grapes in the backyard to admire in the summer.
2 grocery stores (IGA on Rosemont and Maxi on Masson) are very good, though Maxi is more for the budget-conscious traveler. Rosemont is a wonderful, highly walkable neighborhood (with lots of cute cats roaming around) without a lot of annoying tourists and we walked everywhere. You can also rent bikes on the corner of Rosemont and 1ère (about 1 minute from the apartment) and it is about a 20-minute bike ride to Mont Royal. We did not use public transportation while we were there so cannot comment about it.
Charles, as a host, was very responsive and efficient to any small issues we had. There was, for example, a fan in the apartment that was not working. Within a couple of hours, Charles had replaced the fan with a new one. He was quite friendly and was ready to help when asked.