Review (5/5): Just don't leave it in standing water, Einstein
First point: the sonicaire toothbrushes, as a group, are worlds better than any other electric toothbrush out there. Second point: the actual brushing mechanism of all the sonicaires is the same, so think hard before you waste the money on the more high-priced brushes in the line. The various bells & whistles cannot possibly be worth the astounding mark-up. Third point: when the built-in battery of a more expensive model goes bad (and for me it went bad inside of two years), you're screwed. There's no option but to throw it away and buy a new one (though I've seen videos of people cracking open the case & replacing the battery, but really who's actually going to do that?). The xtreme is the best bargain out there, not only relative to other electric toothbrushes or other sonicaires, but on an absolute basis, considering how much money you'll save on dental bills over the years if you use it faithfully. And to those who grouse about the fact that this model is susceptible to water infiltration, I say DUH. It's an electronic device, and its battery compartment is near the base! Keep it away from water, just as you would any other gizmo.