I just grab whichever toothbrush is on sale when I go to the store. I got this one without even realizing it was supposed to whiten your teeth.
I don't think it whitens anything. What I do like about it is it has different sized bristles and they do a nice job of getting into different places. The bristles in the back are angled up so they get behind your back teeth nicely. That's hard to do if you still have your wisdom teeth. My teeth feel really clean after using this.
I will warn you that the handle is really large around. If you like to keep your bathroom neat, this toothbrush will not fit into a standard sized toothbrush holder. You'll need one with bigger holes.
As far as toothbrushes go, I think this one did a better job than most. I will buy it again.