I personally think that this place is a little bit overrated. Yes, their frozen selections are definitely worth checking out, but I had better ones outside of Illinois.
The place definitely had revisit values with their seasonal surprise flavor of the week. Sometimes, the flavor may be so wild that we can the cashier would prefer you to try out a sample before you finalize your purchases.
My personal favorite is their vanilla sundae with crushed peanuts. Their ageless classic serves as my control group whenever I want to grasp how good a chill desert place is. It will not disappoint you!
They also serves some classic items like frozen custard cake, slushies, banana split, and so forth. The place is almost always packed in weekends, but they have very few seats indoor, so expect to sit outside.