I stayed at this apartment for (almost) two months.So, I would like to share my experience:
The hosts (Kirsten and Geoff):
Both artists and wonderful people. They made me feel welcome from start to finish, and were extremely helpful everytime I needed something from them. Communication was very easy too. I interacted mostly with Kirsten, and I liked that she was always with a smile in her face.
The neighbourhood (Roncesvalles village):
Lovely and charming. It is a combination of full big old beautiful houses and quiet streets, and two main roads full of restaurants, convenient stores, and everything you might need (Howard park ave, and Roncesvalles ave). Only a ten minutes walk to the subway (keele station, or dundas street west), or a five minutes walk to the main streets that can take you north, south east and west (buses and streetcars). Transportation is easy in this place. Downtown core is around 40 minutes away on a streetcar or subway.
Highly recommended going to the high park, which is 5 minutes walking to the west.
The apartment:
It has an artsy vibe that makes it very special. It is filled with paintings and nice details mostly made by Kirsten. The entrance is private, and you can use both the backyard and the first floor to do the laundry. It is exactly how it looks in the pictures.
It has one big room, with a very confortable queen bed, one bathroom, a living room and a kitchen with everything you need (including a 25Mbps internet connection).
I am 5' 11'' (180cms) tall, and I had no problems with the roof, but you might find it low if you are taller than me.
Conclusion
Highly recommended place if you are on a business trip, or if you want to enjoy the city. Hosts are awesome, and make you feel like home, and the neighbourhood is very nice. Don't think it twice, go for it!