For a travel toothbrush, it is a good choice vs. the 'ol manual brushes. That said, it doesn't quite compare to our counter top OralB which seems faster. The brush action on this also seems less refined than a counter model's brush action.
Besides for travel, this is also OK for home so that when brushing time comes, the kids can each have their own rather than compete to be first at the counter-top OralB. It can also be more fun for some compared to a manual brush.
At under 7 bucks, the price was good and it even comes with the battery. Compare that to the lofty price of some wiz-bang manual brushes these days and this looks even better.
In sum, if you think this might be for you, then next time your in the market for a manual brush, you might just give one of these a try instead and then decide for yourself.