I stayed here, first time, for 3 nights on a recent business trip. Was recommended by a colleague. Clean, modern, and great staff. Rooms are a good size and well equipped. I stayed on the 11th floor and there was no noise from the trains. Free coffee in the lobby daily from 6-9am, which was surprisingly very good!. Take a quick walk down to Millennium Park and see "The Bean". Best to go early, around sunrise for the best pictures and without other people around.
And don't miss the free Wine Hour in the lobby, daily from 5-6pm. Props on that!