I really like coffee, tea, and wine. These are all notorious for staining your teeth, however, and while I do take care of my teeth pretty well (brushing 3x a day, flossing every day), stains are inevitable. Partially in preparation for the wedding and partially just because it's something I've been wanting to do, I picked up a box of Crest's 3D White Whitestrips - the 14 day version with "Advanced Seal" technology. Each set of strips (top, bottom) is worn for half an hour daily for two weeks.
It came in a pack with a 2-hour version from Costco, for $39.99, which is a steal, compared to drugstore or even Amazon's prices. It has a Crest guarantee on it (full refund if unhappy) and Costco also has a good return policy, so I figured it was worth trying. I gave myself a little over a month before the wedding to do this, so that I would have plenty of time to alleviate any issues that could possibly occur, but also so I wouldn't have to rush through the procedure.
What I'm going to do today is just relate my experience with the product - I'm not going to "review" it in the normal way, because this is a bigger deal than just evaluating the texture of a lipstick. Dental health is important and the situation is different for everyone, so I am in no place to recommend anything. Some people did express curiosity in the manner and wanted to hear how it turned out, so I thought I would share. This will be quite long - I'm trying to be detailed - so feel free to skip.
The first time I put it on, I was careful to pay attention to any sensations; there was a faint tingling, but otherwise, everything felt fairly normal. It is peroxide, so it will foam, so talking is a bit awkward - it's a good thing that S. apparently really likes me. I left both strips on for 30 minutes, and then pulled them off. I rinsed my mouth thoroughly, and made sure to wash my hands before and after. I took a few photos for my own personal reference (teeth photos are awkward, I won't be sharing them - I hope you understand). I did the same for the next two days, but wasn't able to wear them on the fourth day because of my schedule. The directions say that it's okay to skip a few days in between, and actually encourage that if you experience any teeth sensitivity.
It wasn't until the fifth strip that I started to feel a little bit of sensitivity with some of my teeth; I skipped a couple of days and then my teeth were fine again. I did this on and off for the remainder of the 14 sets, so I didn't do all 14 strips in a consecutive two weeks, but it didn't really matter. I definitely saw a marked difference by day 4 or 5 (the box says there should be a noticeable difference by days 3-4). S. agreed. I started on September 10th, and didn't finish until October 5th. This wasn't entirely because of sensitivity, though - sometimes I was just too busy! I will say that it definitely worked for me - my teeth are a lot whiter, now, and I was happy with the result.