this review title is: preliminary review and the content is: i have only had this less than a month and that is is not near long enough to really comment so far it is very good i got the bigger brush and this one is faster than the one i had before one thing i learned with the other oral b is that if you put the holder on the charger with the toothbrush attached it will drip water onto the charger and eventually corrode the base away and the machine will fail i remove the toothbrush put it into a small glass then use my towel to wipe the holder dry that eliminates the problemthe price has come down since i first bought this many years ago the first one was at least and the brushes were each for at wallyworld but they are greatly superior to the traditional brush my dentist commented how clean my teeth were especially around the rear teeth where the traditional hand longitude brush could not reach.there are other information for this review, one is this reviewer did purchase it and the other is 1 people think this review is helpful.