To begin with, I am not a big dessert fan, so I'll leave this part to other reviewers. Of course, there is much more than that, and for what I've heard, I had high expectations.
I had "just" the fillet mignon and the bread, and both of them were vary good. Still, I had better ones in Chicago and other places (and payed the same or even less).
The place is crowded, so get there soon. However, it is very well located. A visit to Chicago includes the Magnificent Mile and the Hancock, where the restaurant is, and this is a great advantage.
I would go again if it so happens that I'm with people who want to try it. But I can easily see better choices nearby.