Definitely whitens!
This product is actually a couple products in one.  First of all, I must say I love the whitening strips in this kit!  I've tried several and they slip and slide all over the teeth.  These don't do that.  They  adhere to the teeth very well because the whitening agent is more like a dry gel, instead of a liquid gel like your typical value store strips.  They are big enough and long enough to cover the teeth well and they whiten very nicely!  The powdered toothpaste is a pass for me.  It's a weird sensation that I just couldn't get used to.  It was difficult to get the powder onto the toothbrush to use on your teeth - the directions don't say if you should wet the toothbrush first or not, so I tried it both ways, and it just felt like I never had enough powder on the toothbrush to actually make a difference or have enough to brush my teeth.  The toothbrush itself is just a cheap bamboo brush and I felt the bristles were a little too soft.  There is also a de-sensitizing agent that comes in the kit.  I don't feel like I need it with the strips, but maybe with the prolonged use of the powder.. overall, I think the strips in this kit work great and are totally worth the price of the kit!
Rating: 4 stars