My husband and I recently dined here while we visited Chicago from Phoenix.  It was the highlight of our trip.  Beyond the amazing, perfectly balanced food, the service was impeccable (coming from a demanding customer).  Our server, Bill, was flawless, knowledgeable and, most importantly, fun.  This was the least pretentious upscale restaurant I've experienced.  The sommelier was also very friendly and the wines were fabulous.  (We thought the $15 sampler was as good as the $28 sampler.) We were stuffed upon leaving, so when they ask if you want more, remember you're going to get a lot, even if the portions seem small.  The decor is rich, warm and gorgeous.  If you like limoncello, their homemade version is the best I've tried.  A must-do if in Chicago!
Pros:  Service, Food Quality/Quantity, Welcoming Atmosphere
Cons:  None
                        
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