Having stayed at many Airbnbs run by good hosts, I would give Sabrina 6 stars!
She is friendly, responsive (bilingual in French & English, may speak some Italian, too), and left a generous basket of snacks and cold beverages for her guests at arrival. Her place was quiet, very, very clean, and in an excellent central location within Petite Italie. Good grocery shopping and multiple cafés nearby. On a very convenient bus line (#55) and just 5 min walk from a Metro stop (for Montréal’s wonderful subway system).
Sabrina brought extra supplies as needed, gave me Metro directions & other recommendations. For warm season guests, the small balcony at the entrance is a cozy place for two to sit outside and take some sun or sip a glass of wine.
Her place is mid-level of a classic Montréal townhome & access is up & down a spiral staircase: I am a retiree & did fine with that, but those who might have issues with stairs should be aware of that.