My husband has long wanted to visit the mills because of family connections, and we finally did this summer. The exhibits were well-done and really gave us a sense for what it would have been like to work in them (and basically live in them), especially the dangers for children of that time. We arrived for our tour at near shift-change time for the rangers. Both were knowledgeable, but the second one rushed us a bit and seemed eager to leave. The guide in the tourist information center across the street (where there is a great introductory video, restrooms, and a larger gift shop) was very generous and helpful about the museum and other places to visit on our trip to the area.