After years of using a conventional electric toothbrush, this new device is very effective and very practical: its very high frequency surprise at first but got used to it very quickly. Deep cleaning (teeth are smoother and whiter). The downside of this efficiency: it probably not be overemphasized (box and / or long) at risk of damaging the enamel over time. Anyway, be careful on the crowns for example ... The recharging glass and USB charging travel-box are also very practical. Very good product for optimum oral hygiene.
