Review (1/5): Only in a pinch...more like desperation.
My dentist took one look at my inflamed gums, and strongly suggested I start using an electric toothbrush. I knew a cheapie like this wouldn't last, but I got it to tide me over until I got a proper electric brush. Even so, this brush was so disagreeable that it induced me to shell out money sooner than I wanted to get a quality brush.
This comes packed with medium bristles. I was wondering why it was so stiff, but then I went out and got a pack of soft bristles, which barely helped. The problem with this brush is that it rotates so fast that you have to use a lot of pressure to keep the bristles in contact with your teeth, otherwise it just bounces off them when you use light pressure. This makes it really hard to control and achieve any degree of precision. Even with all the extra pressure I exerted, I still had plaque in easy spots that I couldn't reach with this brush.
Don't be pulled in by the price. I consider the thing dangerous; it rotates lightning-fast and requires hard pressure. The whole time I used it, I worried that it was going to damage my gums even more than they were already. After about a week I ordered a Rotadent, and finally learned what all the fuss was about electric toothbrushes. Spending extra on a good electric toothbrush is worth it. Don't waste your time with junk like this.