this review title is: as described hurt a bit to use and the content is: this is exactly as pictured and describes and seems to be a good product but it hurt to use it it does not mimic natural chewing motion and if you have any preexisting jaw issues it can exacerbate them if you have a healthy jaw then i imagine this would not hurt but this triggered clinching and strain and made my jaw hurt a bit i think it is meant for those who have zero stress and no tendency to ever clinch their jaw good luck in your search.there are other information for this review, one is this reviewer did not purchase it and the other is 0 people think this review is helpful.