Our hosts were terrific and responsive to any needs that we had. The home is very nice and well laid out. proximity to downtown and to McCormick place all depends on traffic which can be horrendous.
The area is a gentrifying so you need to be aware of where you are going and whether or not you can walk or take a taxi.
There is an amazing supermarket across the street Pete's Fresh market which is one of the best I have seen. You can get 'ready to go' breakfast or meals there. Overall a great place to stay with the amenities that you need and very clean at a great value for Chicago if you need a number of rooms.