system
Given the following post, respond as if you're commenting on Reddit:
human
Are expensive high end toothbrushes actually worth it?
gpt
I will say that toothbrushes with a timer aid in proper brushing technique. The American Dental Association recommends 2 minutes of brushing each time with 30 seconds on each quadrant. Very few people actually brush for that long unassisted. 

Using a toothbrush that tells you how long you've been brushing for (and preferably alerts you every 30 seconds to move onto the next quadrant) is useful for most people.

I wasn't really able to find research on this topic that wasn't sponsored by Oral B or Crest or whoever.