My family started eating at Glass Nickel in the 90s and it eventually became a sort of tradition. One day about a month ago we were planning for someone's birthday dinner and of course, we should go to Glass Nickel. After a pause, my uncle asked the group, "you know, I don't see why we keep going there. Why don't we go somewhere else?" After some brief confusion, everybody expressed their personal opinion that it is not very good, as though their previously great product created enough early momentum in the eyes of Madisonians to stay in our restaurant rotation.
The crust is best described as limp and flavorless (unless you count greasy as a flavor), the sauce has so much sugar you might get diabetes, and the amount of toppings you get vary widely with each pie. Tasty cheese though.
Glass Nickel occupies a place one notch above Dominos and Pizza Hut, but with all the fantastic pizzerias in town like Brutta, why would you go here? It's a poor man's Salvatore's.