The Oral-B Pro Kids Frozen Toothbrush Heads receive overwhelmingly positive feedback, with users praising their effectiveness in cleaning teeth and improving oral hygiene. Many highlight the gentle yet thorough cleaning experience, especially beneficial for sensitive teeth and gums. A notable feature appreciated is the color-changing bristles that signal when it's time to replace the head, helping users maintain good brushing habits. Some mention the convenience of the brush head fitting well with their existing Oral-B electric toothbrush models. While a few note minor app-related inaccuracies, the overall sentiment remains highly favorable, with many expressing strong satisfaction and intent to repurchase.