My second Brown - this one, elected as flexible travel toothbrush, it can loose touch with the "big". Small in dimension, big in performance. Fits comfortably in your hand, the battery lasts for 2 times a day (a 2min) good 7-8 days, so no need to take the same (small) charger with a smaller travel.
For performance that really helps you: the toothbrush does what it must, and the good: she cleans, announces itself visually through red light when the pressure is too large and done otherwise harmless their service.