Great location by the river.
We stayed at the Hyatt for a quick girls weekend get-a-way. The location is just perfect. Right next to the river where many of the boat cruises depart from. Walking distance away from the train system, and about two blocks away from Millennium park which has numerous attractions including Cloud 9. It is also about 15 minute walk to the Navy Pier and 10 minute walk to the John Hancock observatory. The staff were very helpful. The only draw back was that the walls were very thin, so you can hear conversation from next room. But we were never in our room other then to sleep late at night, so it wasn't a hastle.