Ariel's place is centrally located in Mile End, which is great if you don't drive to Montreal. The bars, restaurants, and nightlife are a few minutes away walking.
If you drive, parking is really difficult. I had to circle the block a few times to find a spot, and it was always as someone else was leaving. There was a parking lot across the street but I wasn't sure if it was 24 hours, so I didn't park there.
Overall, the apartment is good. It has 2 bedrooms and the room I slept in had a fairly comfortable memory foam mattress. The windows are a little thin so you do hear some street noise, but the street outside is quiet at night. The floorboards in the apartment creak a lot, and the curtain rods in one of the bedrooms looked like it was about to fall down. The apartment is decent, but needs some maintenance overall in the bedroom and the bathroom.
The host provides a few snacks and drinks for purchase, which was a nice touch. There were also chocolates on the pillows and the sheets seemed clean. The towels in the bathroom looked like they've been used a lot in the past, too. Overall, I would probably stay elsewhere but for the location of the apartment, which was excellent.