A must see on any sightseeing tour.
The Field Museum isn't perfect, but it is close. Exhibits are designed with a range of patrons in mind. The breadth the standard exhibits and constantly rotating pattern of other exhibits means that you could easily visit with guests every year and never get bored.
Like many, my favorites are the dinosaur skeletons. But I find the jade exhibits nearly as fascinating. The museum isn't always laid out in the order I would conceive it to be, but such a complaint seems to me to be petty.
Not petty is the issue over parking. My wife is unable to walk far and there just isn't a good place for us to park nearby, so I must drop her off and then take (sometimes) up to 30 minutes to get back to the front entrance with her. Given the congestion of its location I am not sure how to resolve this, we do it by use of amply provided benches and practice a little bit of patience.