California is historically lacking in proper East Coast (read NYC), Neopolitan pizza by the slice. This place delivers the closest facsimile thereof in SF. It's simple, it's thin, the seasoning is right on, the price is low-ish, and it's fast.
Recently there are restaurants doing very good Napolitanos in SF, but you pay for it, and they ain't a counter slinging great slices on the fly. Arinell is.