Invisalign™ Whitening Pen Twin Pack

Easy to use

It was ok I was hoping just to put it on the trays and wear the trays instead of waiting 15 mins

I did not get the recommended uses out of the tubes. This makes this VERY expensive to just comply with the instructions. The whitening is also marginal without following the recommended use (you cut down uses given the cost thereby invalidating the product's efficacy - bad catch 22)