The Oral-B iO2 Electric Toothbrush receives overwhelmingly positive feedback for its gentle yet effective cleaning, quiet operation, and user-friendly design. Customers highlight the three intensity modes, the pressure sensor that prevents gum damage, and the two-minute timer with 30-second interval alerts, which enhance brushing efficiency. Many note visibly cleaner and healthier teeth, with some mentioning reduced plaque and improved gum sensitivity. The sleek design, long battery life, and included travel case are also frequently praised. A few users suggest that an app or Bluetooth connectivity would be a welcome addition. Overall, it is seen as a reliable and high-performing upgrade from manual brushing.