I love it, but it does tend to freak out at least a few people. They claim I'll crack my teeth or something, but that's probably just a cover for how it makes them feel.
Yes, it could be bad for my teeth, but that's likely not why they're telling me about it. It bothers them more than it concerns them, or they'd stop telling me about it after a few times.
I cannot stand it. On top of just being an annoying sound, it makes me think about / feel pain, because it sounds like it really hurts.