[JK47]

Lot to like about the city too. Strong and growing tech sector means they have a ready talent pool. Nearby access to large universities with strong engineering programs. O'Hare has a long list of destinations, domestic and international, served via direct flights. Not mentioned by others but very important to Amazon would be the ready access to high speed data due to the confluence of fiber optic networks in Chicago and the large number of high capacity data centers.

The post office though might be too small for their purpose particularly if they're looking to put everyone under a single roof.