Love love love this! It works so well but doesn't make my teeth tender or sensitive like some other brands! It really works and removes stains super quick and it is seriously so effective! I'm loving this product so far and will definitely buy it again!

I LOVE these! I have used these white strips for years. The initial box made my teeth noticeably brighter. Now I keep a box on hand and just use them here and there when I need a quick refresher. The extra treatments may not be necessary for some, but I'm an avid coffee drinker and these gems make quick work of the coffee stains.

Honestly, I don't think I noticed a huge difference. Toothpaste can do what these strips do. They taste a little funky, and don't stick to my small teeth very well. They're expensive for the small impact. Just spend the money and get your teeth professionally whitened if you want to see a difference.

This is a good product for someone looking for long term results and if you can keep up with it consistently. I would improve it by making it a better taste! I have purchased once but I found a different brand I love as well so not sure if I'll purchase again. :)

Before any event or special occasion I will use these for about a week and I can tell a huge difference in the whiteness of my teeth. They can tend to hurt my gums a bit because my teeth are so sensitive but other than that these are amazing for the price

Purchased the original Crest Whitestrips some years ago and was pleased. I am not a smoker, coffee or tea drinker and only experienced minimal whitening with the 3D Pro Effect strips. Not remotely close to a professional whitening.Frankly one could probably achieve the same results from a whitening toothpaste!

I have only used 6 of these so far and already my teeth are insanely more white!! I found that after only 2 uses my teeth were noticably whiter and had people commenting on them after the 3rd but also after the 3rd use I started getting sharp pains in my teeth usually around 10/15 minutes after I had taken the strips off. I had to stop using the strips for a few days and go back to them. I found that leaving a few days in between each use helped a little but the pain still occurs after every use. I also found that brushing my teeth straight after using the product can help to reduce the severity of the pain. Other than that I would definetly recommend this product to anyone who has yellow stained teeth as it's worked wonders on my own!

I noticed a difference after 4 days of use, after 7 days is when my husband noticed! The taste does suck, but it's easy to get used to after your second or third time using them! I wouldn't prolong the use of your teeth start to feel a tingle or pain. That would be your sensitivity to the whitening product on the strips.

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!

The only teeth whitening system I use and I'm always getting asked how I get my teeth so white. (I also don't drink coffee or soda that may have something to do with it) I only use this system once or twice a year and it does the trick. It's quick and easy to use. You may need something stronger if your teeth are heavily stained.