I recommend putting this museum on your list of “must see places” in Chicago.
My wife and I took a mini vacation to Chicago last weekend. This was our second trip to Chicago, the previous being way back in 2003. Back then, we visited both the (then) Sears Tower (now, Willis Tower) Skydeck and the John Hancock Observatory. While the Skydeck is definitely taller, you simply cannot beat the view from the Hancock Observatory. The John Hancock Center tower is much closer to Lake Michigan (see this map), therefore you get a better mix of lake and city views. This time around, we skipped the Skydeck and opted instead for the more scenic JHO. Here are a few photos from that excursion.
My wife and I both agree. Unless you have a compelling reason to say you’ve “been there,” skip the taller Willis Tower Skydeck in favor of spending more time at the John Hancock Observatory. You won’t regret it!