teeth whitening which is better zoom or britesmile?

I am interested in teeth whitening and wondering which one you think is better and why? also how much did you pay, did the results last?
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I tried zoom awhile back and it was great, but expensive! The best teeth whitening solution I've found for the lowest price is Movie Star Look. You can try it for free from this link that I found: http://32whiteteeth.com/Free-Whitening-K… The results with this do last. I was surprised how well it works. Best of luck to you!
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