I use the Braun Oral-B Professional Care 600 is now about one month and am thrilled. My teeth feel after brushing so much cleaner to, as with the normal manual toothbrush. With the default 30-second intervals per jaw quarter I'm not quite with, but they are a good guideline. The battery lasts for 2x3 minutes daily grooming about 5 days, which I think is enough - when you are done actually after 2 minutes, he certainly holds a week moving. Something unpleasant I find the long battery charging time, one night is not enough to fully charge the battery, so there's a point deduction.
