I have had the chance to live at Tracy & family's accommodations for about 27 days in total across 3 trips to Chicago during Fall 2014.

Some pluses:
Very friendly, accommodating to changes in schedules, and requests to swap rooms to other empty rooms. Very prompt in responding to requests for replacing items such as water, supplies etc.
Neighborhood seems very safe, was able to come back a few times around mid night from work, so no safety concerns were felt. Streets are well lighted, 10 min Cab/Uber away from most happening places in town.

Some Minuses:
House cleanliness is a bit of concern with her very busy school live; I would give it 5/10.
Breakfast is typically boxes of oatmeal cereal and cheerios.
Having a consistently working internet connection was the most frustrating part; I was given 3 different Access Points to use, for different parts of the house.