I lived in William's place for almost 3 months. The location is just perfect. You can walk to the metro but you can also take a streetcar, if you want. The place is close to Kensington Market - an alternative young part of the city with many bars, restaurants, shops, cafés etc. Everything is in walking distance. Almost every time I went out with friends, we went to places in Kensington.
The place itself is also great. My room was super clean and tidy when I arrived. I felt comfortable right from the beginning. In the kitchen you'll find everything you need. The bathroom is not too big but absolutely enough.
William was a great host. We liked to chat when we were both in the kitchen making food. It was always fun hanging out with him. After a while it really almost felt like a shared flat with friends. He replies super fast and you can always rely on him if you need anything.
All in all I can totally recommend staying at William's place. I had a fantastic time in Toronto and would love to come back :).