I had a really great time at Isabelle and Mariusz' place! They were very welcoming and beyond helpful during my stay. Whenever I had an issue or needed something they were absolutely happy to help, even if it wasn't related to the apartment at all. Truly caring and amazing hosts!
The apartment itself was super clean and as beautiful as pictured here on AirBnB. I can not agree with the former comments about it being loud at all. Of course you can here something from upstairs since you're in the basement but they are super quiet and very considerate of their downstairs guest at all times.
All in all I couldn't have picked a better place for my stay in between Toronto and Mississauga!