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Review title: Crest White Strips are much better
Product review: It's like a giant step backwards. The "trays" are like primitive white strips. They are just awkward.They do whiten very well, quicker and faster than the white strips in my opinion. But, the negatives are pretty big. The gel expands or something and really burns my throat and makes me nauseated. I'll finish out my pack, but never buy again.
