Strengths:
- Ergonomics: no frills, easy cleaning brush, no rubber or dry which eventually rot
- Powerful and very sweet at once
- Very solid, easy maintenance, unbreakable button (the button is a magnet that is moved and the body of the toothbrush is in very strong plastic, even if dropped the toothbrush will not break)
- Brush head without gap which could promote bacterial growth
- Silent
Weak points:
- Weight fairly substantial (some love it, others less)
- No battery because of the engine puissane -> requires an electrical outlet
