I have been using the Opalescence Go whitening trays the last month. I used 6 of them every other day and it has really improved the whiteness of my teeth! They are easy to fit on to your teeth and has a slight mint taste. The UltraFit tray adapts to your teeth and the 15% peroxide gel takes about 15-20 mins per wear. It is also pre-filled and can be used right out of the packaging. The 10% peroxide gel comes in Melon, Peach and Mint flavor and you can wear it for 30-60 mins.
The first two times, I had to spit 8 mins in between. I am really happy with the level of whitening and how gradual it is. You can stop once your teeth matches the whiteness of your eyes!
Ask about Opalescence from your dentist or check out www.opalescence.com