We recently stayed at Mathilde's place in central Montreal for 2 weeks.
Mathilde was very responsive during our stay and the apartment looks very similar to the pictures - the bathroom especially is super cool! The location is very convenient, being only 10 minutes walk from the nearest metro station and supermarket, and even closer to bus stops. The wifi was strong in most of the house except the bedroom.
The main issue we had was that the place was very dusty, which triggered our allergies for our entire stay.
We also didn't appreciate that, after checking out, the host accused us of stealing an entire duvet set - which we had never seen - and taking the entire thing with us on our flight. Luckily, we had taken photos around the flat on our arrival and exit and showed that the duvet set that the host sent us old photos of was not the one that we were provided in the flat.
This is a nice flat if you do not have issues with dust but we would not stay here again due to the host's aggression after our checkout. Unfortunately this is the first negative review I've had to leave in my years of using Airbnb.