Yes it works. Go Smile will whiten teeth, and it will do so aggressively, as it has a higher percentage of hydrogen peroxide than most over-the-counter brands (6%). Go Smile consists of individual tubes of gel that are brushed onto teeth. The gel dissolves on its own, which critics say is convenient, but some experts suggest that it may not be as effective as Crest Whitestrips.
The GO SMILE system works by applying a serum containing hydrogen peroxide directly to the enamel, or outer surface, of the teeth. Because the tooth surface is porous, the serum seeps into the tiny pores to reach the deeper dentin layer where stains from food, drinking and smoking accumulate over time. The peroxide chemically bonds with the stains and causes them to become colorless, visibly whitening the teeth.
Each package of Go Smile contains 20 vials which deliver 10 days of whitening treatment. Also included is an instructional DVD and color chart. The design of the box and vial container is very appealing and suits its high price tag.
Here's a video of the Go Smile Whitening Kit with result pictures.