Sofitel Chicago Water Tower
Compared to other four star hotels we've experienced in this part of town, we enjoyed the Sofitel far more than either the Conrad or the InterContinental.
Never stayed at the Conrad but already stayed at the IC and I fully agree with you about the Sofitel vs the IC : very disappointing hotel outside its very nice location (I know
Nicolas75 will disagree with this assessment

).
I only had excellent stays at the Sofitel Chicago.