Nice Hotel
I stayed at the Westin River North for a few days to attend a company event. My wife joined me since she had never been to Chicago. I enjoyed the event facilities, however I was a little upset with my room. 
Do not stay in room 1207. The air didn't really work so it was a little muggy. The bathroom smelled like pee. I tried to get rid of the smell, my wife tried to get rid of the smell, and the custodial staff tried to get rid of the smell. I was told that the restroom smelled like that due to the toilet. Well then I suggest a new toilet. 
Other than that my stay was good.