Lorenzo's apartment is a very nice place to stay in Montreal. It is in the quiet neighborhood of LaSalle, almost by the river and all the parks that are nearby. Although it is not located at the center of the city, it has good access to bus stops that smoothly connect with the green line for getting there. There are shops for groceries in a walking distance, there is even a dépanneur open until late at night (if not all night long).
The apartment is very clean and comfortable. All the common areas are kept clean and tidy by Lorenzo and his mother.
As said in other comments, Lorenzo is always willing to help whenever it is necessary. He and his mother are very nice people. I am glad that I stayed at their place, and I certainly recommend it!