I confess I was hesitant at first because I've tried other electric toothbrushes and haven't seen or felt any difference. However, I do like the results. I no longer have white patches between my bottom teeth and gums and when I run my tongue over my teeth they look smooth. It took me at least 2 days to get used to it. My wife told me to stop "brushing my teeth" and let the toothbrush do its job. It also took about 2-3 days to develop a tolerance to vibration sensitivity when brushing the backs of my top two teeth. This pack is enough for dentists for 2 years. I also like that she pauses 4 times about every 30 seconds for a total of about 2 minutes. Breaks allow me to move on to the next section (4 sections in total). It has a total of 5 settings, but I only use the "clean" setting. It also remembers the last setting you used so you don't have to change it every time you brush your teeth. The battery lasts a long time. Not charged for at least 2 weeks. It is slim, light and fits comfortably in the hand. Overall I think it's definitely worth it and would recommend it.
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