Easy to check-in earlier than planned, if there are free rooms when you arrive.
The shared areas are cosy and make you feel at home. The style of the hostel is a perfect introduction to the Art Déco ambiance of the city and the rooms are what you would expect for your holidays: a comfy bed and a bathroom.
The only downside would be the isolation (both temperature and noise) as Chicago can get quite cold and animated during the night, and the windows offer standard American comfort against that (no double glazing).
But again to be fair, it's more a country standard and is to be expected in most hotels.
Would definitely book again if traveling around, and recommend.