Had a conference at this hotel. Great location, clean, VERY comfy beds!!! Very polite staff from the minute we were dropped off at the door to the registration folks.
A couple of things that made this a 4 star vs 5 star for me....hardly any water pressure in shower, took forever to rinse my hair. On the last day, there was only scalding hot water in the shower, no cold or in between. OUCH! And the conference rooms were absolutely freezing as were the hallways to our rooms. You could feel the AC coming down on you and I was there in December!
Had drinks at the bar that were horrible. Not sure the bartender knew how to make our drinks and we didn't ask for anything special.
All in all I would stay here again if I were coming back to Chicago for a visit.