We've driven from Chicago to Madison three times now for squash curry and the long song soup. Both are delicious. I can only handle the spiciness level 2. Even 2 is pretty hot.
There are not many tables and they don't take reservations so I would go at an off hour. We did that last night. The place was hopping during dinner service rush hour and cleared out 15 min after our arrival. Perfect when you have a 2 mo old.
Love this place