Fox & Obel, a high-end grocery and cafe, is located in the Streeterville neighborhood of Chicago, close the Navy Pier. I consistently encounter excellent service and great produce and meats at the store, and I am particularly impressed by their fish quality.
The bakery is also excellent, and you will find yourself tempted by all the wonderful breads, pastries, and other goodies they make fresh.
If you are in the area and don't need groceries, but instead are interested in a quick meal, the cafe in the back of the store is pretty quick and delicious. The prices for cafe items also seem pretty reasonable.