The reviews indicate that the fishball noodles stall at Circuit Road Food Centre is highly regarded, praised for its traditional handmade fishballs, authentic Teochew flavors, and friendly service. Customers appreciate the generous portions, reasonable prices, and the stall's consistent quality, with many considering it one of the best in Singapore. While some find the prices slightly high, the overall sentiment is overwhelmingly positive, highlighting the stall as a must-visit for noodle and fishball enthusiasts.