I tried Crest Whitestrips after a dentist visit, when I read that it was the optimal time to whiten teeth, since they were clean and free of plaque buildup. I bought the vivid treatment, rather than the professional effects or advanced treatments. I wanted something that was strong, but not as harsh on the wallet as the professional effects. I used these as recommended, for 30 minutes daily or every other day. Within a few treatments, my teeth were becoming increasingly more sensitive after I was done with the strips. It made my teeth sensitive to even breathe in air quickly. They also irritated my gums. This affect was short-lived, and only lasted about an hour after I took the strips off. I was pretty impressed with the whitening effects, though. The strips are flexible and fold over the top of your teeth. My teeth aren't perfectly straight and the strips were able to still cover all of my front teeth both top and bottom. The gel that faces your teeth is somewhat messy, and it does ooze out of the strip a little bit. All in all, the strips really whitened my teeth and the effects were noticeable! I'll definitely buy these in advance for events that I would like a whiter smile for. I can definitely bear the sensitivity as long as it is short-lived and the effects are worth it.
Crest Whitestrips Vivid