Review (3/5): Well, they work
First and foremost, these things deliver on their promise to make your teeth "noticeably whiter" in two weeks. I'm not going to complain about that.
However, I have noticed the following things:
-These things are insanely hard to get into your mouth the first few times. It's a shame there's no "spare" strips included, because you're likely to waste a couple. The lower strips especially are prone to getting crumpled up and ruined while trying to stick the damn thing to your teeth.
-The gel tastes terrible. I recommend brushing your teeth shortly after you remove them.
-You can't really talk, drink, eat or do anything with your mouth while they're on your teeth- even swallowing is difficult at first.
-The packaging does not stress that you need to use them TWICE A DAY. I made the mistake of using them only once a day until I luckily saw the note on the package.
But, like I said, my teeth look quite a bit better, although this isn't a substitute for brushing.