So, I ordered this product and received it on time. I'm just taking the newest packaging and I have to say everything is fine. What I mean by "good" is that it's well packaged and appears to be legal, but it wasn't sent cold and it literally says on the box that it needs to be refrigerated. Also, I use packages all the time. every other day and leave it on for 25-30 minutes but it doesn't whiten my teeth noticeably. Maybe seeing a "big difference" is a placebo effect, but I honestly don't see a big difference in tooth color. I didn't really have a sensitivity like other posters have said. Again, this product will affect each person's teeth differently based on colour/sensitivity, so keep that in mind. I wouldn't say this product doesn't fully work, but for me personally I would suggest spending an extra $100 or whatever to whiten your teeth at the dentist's office.
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