Aaron probably knows better, but I can give you my subjective assessment. The Inter-Continental is a very impressive building, with a big front directly on Michigan Avenue. It has an interesting history and a striking and memorable swimming pool. It has some very nice rooms, but opaque customers are more likely to be put in the smaller rooms, which are nice but not as nice as the other two hotels. (In case you do book this and get a choice, you want to be in the Historic Tower, and to my mind it's worth paying $20 or $30 for an upgrade.) The Hyatt has the rooms you would expect at a Hyatt -- very functional and comfortable and well-maintained but kind of cookie-cutter -- and the views are really amazing (esp. if you can get a high floor, of course). I have not seen the rooms at the Amalfi, but it is a more personal, boutique-y hotel. The views are not going to be as good as the other two, but I think the rooms will have an elegant, signature touch. One good thing: all three of these have incredibly good locations. Walking around this area at night is pretty dazzling (even for a native New Yorker like me!).