Good subs. Nothing exceedingly special in terms of the sub itself. Fun choices that are a little different from the typical subway/quiznos.
Super duper thing about Erbert and Gerberts is the fact that they have gluten free sub bread. And it's not like other places where your sandwich ends up half the size because the gluten free bread is tiny. This is like a true sub (maybe even wider than their normal bread). And delicious.
Not five stars only because it lacks more sophisticated stuff (sprouts, peppers, carmelized onions, hummus etc). Not really a great reason to dock them a star, because they aren't really that kind of sandwich shop, but hey, I can be fickle plus or minus a star.