Pretty good I'd say it's worth it to try
3 stars for whitening  I only used it twice and not sure yet..it does however have a very minty sent . Love that it comes with 2 me and my husband are giving it  a try. Update a month later I have not used it continuously so I cant say but even just the 1 time using it it works decent I have to say I was pretty suprised.
Rating: 3 stars