not really a fan [SEP] i do not think i will continue to use this gadget for one like others have said it is larger than it appears it is kind of hard to get into my mouth and biting it is not really ergonomic i followed the directions in the description and boiled it so that when i bit down the clear bits became an impression of my teeth however i did not find that to be much help later on i used this a couple of times and while i did find my jaw feeling sore afterwards i do not feel comfortable using it for the long term my jaw is not in good alignment something i need surgery for but cannot afford so i got this with hopes that it could help support my jaw and keep it from getting worse i also have a hard time with jaw discomfort from teeth grinding and my dentist said that exercises can help alleviate that issue due to the large size and ill fit i fear that it could do more damage to my jaw and bite than help i think overall this is a lost cause for me but maybe someone else will have better luck