Hitheam and Nesma are the best. I stayed in the appartment for a bit more than two weeks, and it was a wonderful experience. They are always attentive for your comfort, and have good ideas if you want to visit Toronto.
Concerning the appartment, it is gorgeous. you have a view on the CN tower, and just next to the Scotiabank Arena (perfect for basketball games). The place is fancy, very clean and has everything. You are at the middle of the financial district, with the biggest buildings, and you are very close to the lake, which is perfect for a jog.
You even have access to the gym, swimming pool, sauna and jacuzzi, which are at the second floor.
In a nutshell, the place, neighborhood, and people are the best.