I expected more
I stayed last summer at Hilton Chicago along with my family. It's a big hotel that should be luxurious, but I thing it's an ok hotel. 
I had some problems during checkin. I stayed there durinh Chicago's 175th anniversary. There was a promotion where you should pay 175 dollars a day and have 75 dollars back to spend with the hotel facilities. The front desk girl forgot to consider the promotion. I only discovered when I tried to use my $75 credit. So I complained at front desk and they only considered the promotion apart second day.
The room deco is recent. Good furniture and spacious. Inside the hotel has some restaurants, a Fedex office, garage etc. 
In some occasions, the maid didn't clean up the room. 
When I did checkout, they didn't include some spenses in the promotion. I had to convince the front desk girl showing in my cell phone the inormations on the website where I bought the promotion.
The hotel has good facilities as a four stars, but its staff is not that good.