We were there earlier this summer because this shop had shown up on some best of Chicago lists.
The ice cream was ok and the service was nice. What was not nice was overpaying for a nostalgic experience. I was totally bummed when I saw the hot fudge for my wife's hot fudge come out of the microwave in packets.
They were trying, I guess, but, at the end, you get an ok sundae and nothing more and you will pay too much for it.