Overall, we were really happy with this pass. I feel it was a good savings, and it helped us organize some of the attractions in Chicago. We purchased through Costco.
The only negative-----
We purchased a Go City Explorer Pass with 4-experiences. We chose the Big Bus one-day tour as one of our experiences. Also on the list of choices, is the Big Bus night-time panoramic tour. Unfortunately, when we got to Big Bus in the evening, we were still subject to the $10.00 upgrade fee per ticket. The wording on the Go City website is not clear about this. I can see if we bought a one-day hop-on/off ticket through Big Bus and wanted to also do the night, that we'd then upgrade. It clearly says that. BUT, the night tour was also listed as an experience option. We shouldn't have had to pay the upgrade, it should have just been one of our experiences from Go City. If I had only chosen the night tour - that would not have been subject to the upgrade fee. So, I got penalized for choosing both for no reason. There should be an asterisk on the night tour right on the list of experience options pointing this out.
Very frustrated about this. Otherwise, I would do it again.