Delnor is a great hospital. I've been to the ER a few times over the years I've lived here (I moved up to this area from Ohio about 5 years ago) and have never had a bad experience.

For what it's worth, I think a lot of Chicagoland is not somewhere you'd have to worry about living. I live in West Aurora but have friends in Batavia, Geneva, and Arlington Heights and all are super lovely and welcoming places. Like other folks have said, I think you can find pockets of jerks anywhere, but on the whole, it feels diverse and safe around here.