I must say that I mostly enjoyed using this mouthwash, certainly because it doesn't burn like regular Listerine. I was really convinced that something would happen because truth be told, Listerine is a trusted brand. After the first week, my teeth had significantly less plaque after food and beverages but I cannot say for sure if my teeth were getting whiter. By week 2 I was convinced that there was a difference but then I started to react a little, I'm not sure from what exactly but my tongue, inside of lips and palate were certainly feeling somewhat raw. So i stop using the mouthwash for a few days and the feeling subsided.
I carried on after about a week for another 2 weeks and the feeling in my mouth came back. Which is why I personally cannot repurchase it until I can identify the allergens in it. Other than that I would recommend the product to someone willing to use it correctly.