14 of 16 people found the following review helpful
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This review is from: Mammoth XT Gum Shield Pro Mould - Moulds to exact shape! (Misc.)
No problems with it at all. If you follow the instructions as directed you cannot go wrong! I did have to heat it twice to get it to the full comfort fit, but the instuctions do advise that a second attempt may be required. Good product.