Review (5/5): Effective
Very effective product. I've used this product in 2007 and 2008 summers. Although now is summer 2009 and I haven't use another pack, people still compliment on my teeth and ask me what's the trick. This product is kinda magic and really works for me. Actually, I haven't finish my pack last summer, since my teeth are already white enough.
The only drawback of this product is that it makes my teeth felt a little sour during the the usage. I'm not sure whether this is a typical thing for all teeth strips, because I've only use this product and plan to stick to it.