Not the best
Went to this hotel for 2 nights to attend an exhibition at McCormick place.
First impressions were ok apart from the numerous casually dressed people milling around in the reception area. I suppose I have been spoilt staying at the Ritz Carlton on my last visit.... The price charged £200 per night was not justified based on my first impression although the prices do rocket when big conventions are in town.
I requested a room with a view of the Willis (Sears) tower and the recptionist told me he would do his best. I was allocated a room on the 17th floor which did have a good view so was pleased about that. 
The rooms are a good size with a small balcony which was good for having a view of the local area. The only thing I could fault was the lack of a mini bar which I thought odd. Other than that the room was above average.
The location is ideal for the convention center as a taxi was only $8 and also for shopping on the "maginificent mile" which was a couple miles away. There is a Walgreens located directly outsie the hotel which was handy as well as an Irish bar 2 minutes away. 
Would I stay again? Probably not.....