S.B.
I have the one that fits over just your front teeth - the dentist molds it for you. I've had it for about a year now, and I would highly recommend it. I would grit my teeth in my sleep and have had several actually develop cracks because of it. No new cracks in my teeth and the existing ones have not worsened since I got the guard on. That right there is worth it in repair costs to my teeth! It took about 2 weeks to get used to tho. The first night you wear it, you'll regret getting it and think there is no way you can sleep with it in. But trust me - 3-4 days you'll be more used to it, and within 2 weeks you won't even notice it.