1 Star for the Self-Application Teeth Cleaning & Polishing.
4 Star for the whitening part.
First of all, the $89 self-cleaning & polishing is a joke! Painful and unhygienic, and the polishing result is uneven. What you do is brush your teeth yourself with different pastes. After each paste, just slightly rinse the toothbrush and use the same toothbrush dig into another jug of paste that everyone shares! It can be contagious if other customers have teeth/gum problem. It's really UNHYGIENIC! I strongly suggest that using a spoon to scoop those pastes! My gum was very painful, red and bleeding for days after this.
The staff were friendly, although the whitening is not as white as expected, but did improve though. The whitening result chart is exaggerated. After the treatment, my teeth felt very sensitive for two days, still acceptable. But my gum was painfuly for a week or longer, I believe it was due to using those self-polishing pastes.
After all, I would recommend this teeth whitening if you really need to, but DO NOT go for that $89 Self-Application cleaning and polishing. For better results, go to your own dentist for the cleaning/polishing and wait for a couple of weeks before you get teeth whitening.