After a few months of testing here is the conclusion: A VERY POOR QUALITY product: 1. Dangerous After a few days of using the plastic support at the back of the rotating head breaks, the rotating part is detached from the holder and clip the skin in the mouth. 2. Ineffective This product leaves deposits in the interdental spaces, unlike the Oral B trizone model that cleans perfectly 3. Dear These brushes are broken after one to two weeks or so, while the original Oral B trizone last between 4-6 months.
Conclusion: Therefore, they are at least 3-5 times more expensive than the original model, dangerous, less hygienic. Prefer the original to the copy.