This is not my first Oral B, I find this very satisfactory model. I was looking for an affordable brush (40), with a relatively strong movement, I am adept hard brushes when it comes to manual toothbrush. And with a small head, Trizone kind brushes repel me particularly, and if possible that can hold QLQ days without recharging, so as not to carry around all the base when we are going for a weekend. This brush meets these criteria, the only downside is that it is a bit noisy, but I found exactly the same among all equivalent products. And those who are more discreet have much less oscillations / min, and the sensation of own teeth is not really there at the end of brushing. And finally the sound I got used