Of course crest whitening strips work. The stronger ones, the better. I knocked off a star because these caused sensitivity issues for me. I had to switch to gentle routine version that are only worn 5 min. I tried wearing these for five min but sensitive issues persisted. If you don't have that problem then def try these for bright white teeth. Look for coupons.

I love these whitening strips! They are easy to use and you can see a difference right away! They do kind of leave your mouth feeling a little strange at first (as would any foreign thing being pressed on your teeth lol) but I think it is worth it for the $!

These are my favorite and the only whitening strips that have truly worked for me! The picture attached I have no filter or editing on! People always ask how my teeth are so white and I always tell them these! If you're questionable, GET THEM! You won't regret it!!

I've tried many whitening products but this is the one that really showed a big difference! I used only a few and people already started noticing . I would get compliments daily of how white my teeth looked and the best part is that I didn't have to whiten them for a whole year! They last so long and give me confidence. My teeth did hurt a bit but I feel like that's with any whitening product if you have sensitive teeth . I will 100% recommend to anyone!

These strips have been around for years and are a new feel way of whitening your teeth at home. My teeth to get somewhat sensitive after using them. However, I do just naturally have sensitive teeth to begin with. You really can't go wrong with these.

These are great. I just hate how long they take. And you also can't eat for a certain time after and I feel like the whole time portion of takes up a lot of my day, so my piece of advice is to manage your time better if you want to use these. Overall: 9/10

Love these whitestrips I have been using these white strips for many years. I just love how they make my teeth whiter and brighter. I get so many compliments on my teeth, even my dentist exclaims how white they are and ask what I use. They even laugh when they have to move the light above me because they are so bright. I would, and have recommended these white strips to my family and friends. I use the professional effects.Less

These strips are my holy grail!! I have naturally tainted teeth which my dentist says is healthy but for cosmetic purposes recommended only this brand. Worked after just the first time and I've been using them ever since! Results last almost a month or so!

These work! I was on medications in my very early years which caused discoloration on my teeth. My DDS said mine wouldn't ever be radiant white if done professionally. So, i tried white strips. They really brightened my smile. The only downside, imo, is waiting 30 min.

I used to use these regularly, I definitely notice my teeth get whiter but it makes my teeth super sensitive! I now only use them on special occasions and have found that cutting the strip in half helps! Since the strip is smaller it doesn't touch my gums and doesn't leave my teeth feeling sensitive! Plus you get more uses!