First time to the US
I travelled to Chicago on business and spent 7 nights at this hotel. I was initially put in a poor room with constant outside noise. After speaking with a member of staff called Karina at reception this changed quickly. I was moved to another room where I did not suffer from the external noise from the hotel which was great as the time difference made sleeping difficult enough already. Corrine also placed food orders for me on two occasions given that my accent was fairly difficult for the locals to understand which made things very easy on an evening to eat so I could get on with work.
Given Corrine's excellent service and the staff in general being pleasant I would definitely return to the Club Quarters, East Wacker Dr, in the future whether it was on business or with my friends or as a couple. 
The hotel is also situated very well for shopping, bars and sports venues such as Soldier Field are within walking distance.