To use this kit simply apply the GLO gel onto your teeth and put on the mouthpiece for four consecutive eight-minute applications per day. They suggest doing this for three to five days in a row or up to 10 consecutive days depending on how stained your teeth are. You’ll only have to this twice a year. Also if you’ve used Crest stripes you might have experiences some lip dryness, which is why GLO’s kit comes with a lip care product. Another point of difference is that I sometimes had trouble getting the stripes to stay in place, this isn’t a problem with GLO thanks to the mouthpiece.
Again, I haven’t tried this myself, but based on the clinical studies (and the co-founder’s stellar teeth), it looks like a promising device!