Not up to Sheraton standards
We were very disappointed in this Sheraton. Rooms are old and in a serious need of updating. Wallpaper peeling severely. Our bathroom was dirty and was never properly cleaned the entire 5 night stay. There was a large, prominent cigarette burn on top of the comforter that was never replaced for the whole stay.
Location is good and most of the staff were very nice. 
The one, extremely rude, low class staff member was the older woman with long dark hair working in the Club Lounge. She was nasty and snappy and would only change her tune if you ordered wine from her. She even kept the water and pop in the back so that you would have to "order" it, hence her trying to get tips. The small amount of food put out at night was pathetic, the floors were covered in food and the food was not replenished. 
On the other hand, the gentleman who worked in the club lounge in the mornings was friendly, professional and hardworking. He managed to keep the area clean and food replenished at all times. He also put the beverages in the beverage fridge so we could help ourselves (as it should be!).
Another gripe with the Club Lounge is that for our entire stay neither computer in the lounge worked. There was no sign on either computer saying they were out of service either. Finally, we were told that they had been out of service for a week. Unacceptable.
Within a quick walking distance to Fox and Obel which is a gourmet grocery store and take out. Excellent food.
First and last time at the Chicago Sheraton but definitely not Chicago which is a beautiful city.