Professional, or at home? (If your insurance pays for this, I say go for it. And get veneers while you are at it! Otherwise, it is just too expensive)
To paint, use strips, or get trays? (I like paint-on or strips the best, those trays are too bothersome)
Should I be worried that I am swallowing chemicals that bleach my teeth? (Not any more than you should be using antiperspirant/deodorants with aluminum)
Unfortunately, I haven't had the chance to try many brands, especially the expensive ones. My friends Polly and Jodel recommend Crest whitening strips. I really like Target brand, $5.00 paint on teeth whitener. For the price and the result, you can't get any better. If anyone has tried others and would like to share a review, let me know!