Whiten Teeth with Whitestrips

So I have used 6 packs and the verdict: IT WORKS!

Well, you can't see it very much, but when I compared pictures, you can see a definate difference.

I actually used them every day instead of twice a day like the instructions. It should have taken 3 days to see difference, I noticed in 6. So it just takes longer but no other side effects by taking them slower.