I had the opportunity to test various electric toothbrushes of the brand Oral-B (as well as a sonic toothbrush other brand, with which I do not get along). There are differences in Oral-B on the one hand with the brush articles (each article on each handpiece fits) and the handpiece itself. The standard is one the handpiece by Oral-B, an internal timer - toothbrush makes after 30 seconds a short stuttering sound. The manufacturer recommends that you brush your teeth Quadrant way z. B. the top left outside inside chewing surface, the top right outside inside occlusal surface. So you have 30 seconds for each quadrant. I see a problem in that it a) is completely unfamiliar (would normally above the outside, above the inside top chewing surfaces in between then you have a break, if done so) and b), the middle teeth in this way very easily either be trimmed too short or too long. Also standard is a Pressure sensor if the pressure is too large, the brush heads move only seeeehr slowly. The handpiece differs from other models, such as the 600 that it has different speeds. One can of Daily Clean down rules on Sensitive. Who does not need, is as well advised with the 600, however, is the 700 for my feeling better in your hand, it is more oval than round. The battery power of the brush is very good, clean daily at twice it holds about 7 days. The deep cleansing brush is my favorite of all tested papers. Here I have most likely to feel clean teeth. However Färbetablette shows otherwise. TriZone with the teeth, the result were cleaner, similar to the personal cleaning performance. (To my dismay, however, I realized that none was sufficient of everything, particularly at the transition to the gums.) I think that the only way the teeth really clean enough, is the use of different attachments for the morning and evening. I would recommend TriZone and deep cleansing brush here. (Note: In theory, it is enough to brush your teeth every 24 hours very well, so it does not matter if the paper in the morning does not reach all areas, which dealt with the essay in the evening and vice versa.) In principle, do not convince the electric cleaning. I think it's very good for plaster muffle (we have a 9 year old and a Ü40 tester in this category) and people whose motor skills is not enough for a good cleaning performance (again, we have a tester). Very important: The best deep cleansing brush does not replace the use of dental floss or other intermediate purification methods.