Previously I had the oral b brush with round head and thicker, stronger grip - Thrilled, I am of the new slimline pulsonic, it is easy and comfortable to hold, has a sensitive button and a timer where you just noted when 30sec, a zahnpathie has brushed. The brush is not by chance that I think is a pity, they must always snap into the mount, or put them in a tooth mug, the brush sits very firmly and always has to be removed with jerk, hope that does not harm the material. ... therefore a star deduction