What is the best/most successful take home teeth whitening system?

Please only answer if you used the system and it worked wonders for you =)...
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I'll tell you that Glistel from visol.com worked for me. I drink four to five cups of tea a day and got my teeth really yellow - even my dentist commented how yellow it has gotten. I used Glistel and in less than a week my teeth were already up to standard - I like to compare my teeth to a white towel, it's my form of measure. It is a really inexpensive teeth whitening gadget from http://visol.com/en/products/Glistel.htm…
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