Never having visited Chicago before, I didn't really have a set impression of this place. I am impressed with what I have seen so far. The first impression I had was of all the greenery everywhere. Parks everywhere.
I haven't been on the lakeshore but it looks wonderful from afar. Marinas, walking / bike paths, and a large carnival area.
Today, friends of the family bought us lunch in Milennium Park - an incredible place with a Frank Gehry designed bandshell (think round curls of metal everywhere) and plenty more public art. I haven't transferred my digital camera photo pictures yet but here is a photo I stole from another web site: