Super convenient and easy to use while going about your business, very effective from the very first use!
I had never used teeth whitening strips before trying these Grind Free strips.  I couldn't be happier!  I'd tried brush on whitener before and it was awful, trying to keep my teeth exposed and dry.  There was slobber everywhere and the time waiting to be done was a nightmare.  NOT the case with these awesome strips.  Each package includes a set of strips, one strip for the top teeth and one strip for the bottom teeth.  The strips fold over the teeth, setting them in place and they stay!  The first time I used these strips I struggled to try and keep my teeth exposed, worried about the strips sliding around and getting out of place.  When I finally tested them (needing to swallow!) I happily found that they stayed in place and I could actually happily go about my business for the half hour time that they take.  I was a little confused about the time allotment for them...the packaging indicates 20 minutes, but the Amazon sales page indicates 30.  When the time is up, they are easy to remove and the &quot;goo&quot; left behind easily brushes right off.  I am impressed with the whiteness these strips give my teeth and have been happily using them a few times a week for the past month.  I will continue to use these teeth whitening strips for their convenience and effectiveness.  The only thing I'd change if I could would be to make them wider, to include more teeth while whitening.  Overall, I'm very impressed!
Rating: 5 stars