My family and I took this tour while visiting Chicago. My college-age sons and husband all agree that this was the highlight of our our trip. Our guide was informative and funny. We saved the tour for the last night of our visit thinking we would be tired and want something relaxing to do. I wish we'd taken the trip on our first night because we learned so much that I would like to see on land. We have all agreed to come back take another tour. Highly recommend.
Seemed like a lot to spend till we got up there. The views are soooo worth the price of admission! Be aware: parking is spendy. We paid $20 to park in the building with the venue.