My dentist recco'd getting a nightguard and said try the ones at pharmacy before speind $$$ on a custom one. I tried this and it took 2-3 nights to get used to but it seems to work now. Keep in mind you have to adjust it to fit and then wear it to make sure you have adjusted it correctly...so it may take a few days to get it right. For me, Its comfortable and it is working - my jaw is not sore when I wake up...a good product. It was onsale for about $30 but I know the reg price is about $40. That is a good deal.