The actual product is acceptable, but the manner in which Spark Whitening goes about collecting money is nothing short of outrageous! They sent me a sample and then told me that I had to already received my sample, which is not true. They charged me $99 for what I did receive, which should actually have been my sample. They could never get their story together so I canceled my subscription, which is too bad because the product is actually pretty good.
Bottom Line: No, I would not recommend this to a friend
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