I don't recommend for sensitive teeth
After a couple of weeks of using just half a tablet (they say to use a whole one) my teeth started hurting so I quit using them regularly and just use ever so often. A friend who is Korean translated the information; basically nothing is written in English. One thing was there will be hardly any bubbles but even half a tablet is way more bubbly than what I'm used to - Tom's.
Rating: 3 stars