I like this product. I noticed a difference on the second day. By the fourth day, other people noticed too. Way better than the other white strips I used in the past. The only thing was the day after using it the first time my teeth were extremely sensitive. But by the second day that feeling was gone.
I would and already have recommend to friends and family.
I made my dad go buy them and he said they work well and his teeth are whiter.
I recieved this product to test from chickadvisor so I am not sure about the price.
Works awesome..Thanks Chickadvisor for hooking me up!!!!!
Here's a pic of my shiny white teeth!!!!! I'm the blonde..

The results I've seen after 3 days of using this product were enough for me to go ahead and write a glowing review for this product. My teeth are already much whiter than a few days ago!

PROS: affordable, very effective, easy to use, strips do not slide off teeth
CONS: leaving them on for 2 hours can be hard, especially if you're impatient like I am
may cause teeth to become sensitive (so far, this hasn't happened to me)

I've been using Crest White Strips for a very long time, actually, since they first came on the market, and with each new product they launch, the quality improves. I'm always getting compliments on how white my teeth are even though I drink 2-3 cups of coffee per day, and its all because of the white strips! Thanks Crest!

Up front, I will say this product gave me amazing results. My teeth are absolutely glowing white and I love it. So, it you want super white teeth without the dentist cost, this is definitely an option.

HOWEVER, it didn't come without a cost.
First off, if you have sensitive gums, this product may not be for you. Personally, I do and this product caused them to become very inflamed.

I also found this product made my bottom teeth quite sensitive. Not super painful, but definitely flinched with super cold water a couple of times.

Using the product was pretty simple, although I did have trouble keeping them in place 2 of the days. Being a mouth-breather, I tend to create more saliva than most and I think this affected the 'staying power' of the seal. It was still better than other versions of this product I've used in the past (sometimes those didn't stay on for 20mins) but most days, these did last the full 2 hours.

Which is another somewhat tough thing. Keeping them on for 2 hours felt like a bit much sometimes and I removed them on occasion before the time was up, as they were starting to 'leak' a bit.

All in all though, as I said, they're definitely worth it if you really want super white teeth, but be warned there are certainly some side effects.

5 days ago I have received Crest 3D White Whitestrips Intensive Professional Efects
Firstly, I would like to mention that I have always dreamed about trying some kind of whitening, but the the idea of going to the dentist`s office was not really reasonable for me. Crest suggests an alternative 500$ at your doctor`s clinic. I am satisfied wirh the price.
Secondly, the quality is amazing. Now I have a great smile. It took me only 5 DAYS! Only 5! I am looking for day 7 to look at the final result.
Finally, there is the Advanced Seal Technology. It insures that the streep will not slip during those 2 hours. For me as a customer it matters a lot since I am slightly scared for my gums. They are not at all sensitive, but you never know what may happen.
To sum everything up, I am 100% happy with the whitestrips.

Today I tried this product. I was pleasantly surprised that the strips did not feel very gooey in my mouth and did not have any problem keeping them on for 2 hours. After taking them off however, the pain started. I now have the same shooting pain as if I had bitten tin foil. It is seriously painful and didn't even eat dinner in fear that it would make it worse. I see now too that I have white spots. It does say on the package that this may happen. Hopefully tomorrow they disappear. As much as I really want white teeth, there is no way that I am doing this again tomorrow. I can't imagine the pain if it gets worse. I can't say that I would recommend this product. The cost is very expensive too. I hope other people have better results than me.