I thought these strips were great. If used for a long period of time then I see a difference However they make my teeth extremely sensitive so I only use them when I have a big event coming up

I don't know what took me so long to try these. I'm 50 and take good care of my teeth but they were definitely yellow. I was skeptical but they do indeed work and I saw results.

Have tried many different at-home whiteners with disappointing results. Crest Professional Effects is truly the first one that resulted in a noticeably whiter smile.

I've been using this product for about 3 months and my teeth have gotten whiten so much! I'm so happy with the outcome in this product. It is 100% worth the money and if you struggle with yellow teeth, give this a chance!

I like the results of these Crest white strips. I had a hard time getting them to stay in place and first however, and they tend to make my teeth sensitive. They work but you have to use them consistently and they are a little pricey!

I like to use these whitening strips for a couple of weeks before an event. They work quickly, and results are noticeable in a few days. I wouldn't say the results last forever, but definitely work if you use consistently.

I love this product! It really works perfectly, in the first use you can see the difference, but you need follow the instructions for totally right use. Really good.

These really do work and make your teeth so much whiter BUT warning IF YOU WEAR THEM LONGER THAN 30 minutes your teeth will hurt the next day and be extremely sensitive so be careful and don't wear them longer than recommended time

Along with Crest whitening toothpaste, I use these whitening strips a couple times a week. they leave my teeth showing a simple layer of a brighter white each time that I use them. They are a little on the higher side, but they are SO WORTH IT!!!

They are okay but don't seem to whiten as much as they used too. They also make my teeth very sensitive very quickly compared to other whitening products. I don't think I will be using again. I recommend if you haven't used strips in the past.