Has anyone tried Zoom Teeth Whitening?

I am getting it done in the middle of January and wanted to hear some feedback.
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Hi have been using Zoom whitening on my patients for the past 4 years and have seen good results although the results vary from patient to patient. The Zoom light has been superseded three times and I am now using the Zoom Advanced Whitening Light which I find is much better than the previous two. I have seen colour changes from 6 to 15 shades. Any whitening process dehydrates your teeth which is where the sensitivity starts. Not everyone gets sensitivity but usually if a person does experience sensitivity with Zoom it lasts for around 12 hours. The type of teeth that don't bleach very well are very dense dark yellow teeth or tetracycline stained teeth. Most other types of teeth whiten well. For dehydration I suggest that my patients drink lots of water after the process and I also give them a product called tooth mousse which floods the teeth with calcium and phosphates and helps reduce any sensitivity. I also provide them with take home trays and a tube of bleach for maintainance. I suggest that they use the home trays for one hour once a month to keep the colour maintained.
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