Ever shopped for an electric toothbrush? It sways you with the idea of better cleaning than a regular one. But while you're already getting an electric toothbrush, you might as well get one with a timer. Or the one with three different types of cleaning heads. Or one that also shoots mouthwash between your molars.
Pretty soon, you get the feeling that those $230 could have been better spent on something else...
Let me come back to that.