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Title: Really works, but replacement costs...
Review: The effectiveness of the Sonicare PS-1 is most easily explained by just using it. First impression is that it's quite a strong device. But after getting used to it, it's a cinch.Because it's so powerful, after brushing you feel like you left the dentist's office. I don't doubt the claims of other ppl that this is a great toothbrush. But, I realized after the fact that replacing the brush heads are an expensive proposition, as compared to the competition. Even though the brush heads are recommended to be replaced every 6 months, the replacement costs are still rather high.
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