My wife was the first in the family to purchase a Braun toothbrush approx four years ago and has used it religiously ever since.Over time,two of our children followed and finally myself.Charging the toothbrush overnight will give up to a weeks usage and the toothbrush will last years.However,the heads need changing regularly,approx every 3 months and this is where the expense lies.As another reviewer has alluded to,not all heads fit the Braun range so be careful.As a family,we use these Precision Clean heads as we find they offer the right combination of thoroughly cleaning and being relatively durable.Highly recommended but remember to shop around as prices & postage vary.