Great toothbrush
This unit works really well and holds its charge. I don't know about the actual usefulness of the multiple settings, but I've found them entertaining, at least, as they make different buzzy noises in my mouth. :-) I would give this 5 stars, but the way the buttons are oriented causes my fingers to accidentally change the setting sometimes, so I have to be more conscious of how I hold this toothbrush compared to others I have used. So if you have big hands, you might want to consider that. But mostly I'm really happy with the purchase.
Rating: 4 stars