Review (4/5): much needed device
i work night shift and am a massive coffee drinker, so, my teeth really needed some treatment. i have tried so many other products. it combines gentle warming heat and safe LED light to activate the whitening process. these are 8 minute fast treatments and results can be seen very soon. my teeth are very sensitivity and these whiten teeth with no sensitivity, so, that's a huge plus point for me. I'm really liking the results, and will continue to use it for better results