It took me and my wife a few months to find a good pizza in Saginaw after we moved up here, but without a doubt, Tony's on State Street is hands-down the best. The service is borderline terrible because the owners don't scheduale enough staff the place, but it's worth the wait.
Don't blame the VERY busy waitstaff for a long wait, blame the owners. The food is excellent, but the pizza is the best in town. Homemade and proper onen-cooked for a great price. Phone your order in and pick it up. I drove through a snow storm, 18 miles round trip in December for a pie!!