Honestly they can be pricey at regular price but many generous coupons are often available on their website and they do go on sale at the drugstore often but in terms of quality.. worth it! just make sure you're home when using it although it seals on well and doesn't move around it does give you the urge to spit a lot as it causes a lot of foaming in the mouth during treatment. I wear them for 2 hours and my teeth are noticeably whiter after the first use and by the end of the box they're shining! :D*

I recommend that if you ever need your teeth whiten in a short period of time, go with this product!
It works it's magic after very few strips and it's easy to use and apply!
It's not that much money but you definetly get what you paid!
Really happy with results!

Love love love these white strips. I use them often however it's hard for me to keep them on for the full 2 hours. I usually just do a quick 30 minutes to keep my pearly whites, white.

I received Crest 3D White Whitestrips from a P&G;everyday sampler pack. I was surprised that these really worked!

Application is really quite simple, just follow the instructions in the package insert. The strips adhere perfectly well for two hours and I did not have trouble peeling them off either. As with most teeth whiteners, mild sensitivity is to be expected especially when taking in hot or cold fluids. Using a straw to drink even just plain tepid water worked for me.

Unfortunately though, it did not work for me. The thing is, I have dentures. My natural teeth went about two shades whiter with this product and it doesn't work for synthetic ones. It specifically said so in the package insert but I tried anyway. End result, two shades of teeth for me. And it really lasted quite a while! But I definitely would recommend it for others with NO dentures whatsoever!

After only two uses my teeth were atleast 2 shades whiter. the reason that I didn't give it the full 5 star was because if I use it for more than 10 minutes my teeths would become really sensitive. I did an in office whitening before as well as use a whitening pen that I bought from sephora and neither of those got the result that I wanted. Crest White strip got the results that I wanted and IT LAST. I only had to redo it every six months or so.

My only advice is that if you are going to use the Crest 3D white Whitestrips Intensive Professional Effects, only use it for 10 minutes. You will still get the result but minus the tooth sensitivity.

I love these whitestrips. The work much better than any competitor brands and I did not have any sesitivety issues with these ones.

I was really wowed by these whitestrips! I have used the classic 14-day version in the past but it had been a while since my last whitening and needed something that would brighten my teeth a little more quickly.

The seal on these strips was incredible. I actually had to tug for a while before they came off after the treatment time! Unlike my previous experience with strip whiteners, the fact that they stayed in place led to less product getting into my mouth and producing extra saliva. I also think the staying power led to more uniform whitening. When strips slip and slide, I usually get patchier results in the early days. All of these issues were big reasons why I don't whiten as often as I'd otherwise like.

Another reason I don't whiten very often is because I have sensitive teeth. I knew all along that these strips are not specifically designed for sensitive teeth, but I needed to whiten and I received this box of product for free so I decided to pace myself and see how it would go.

So far I have only used the strips for one treatment, but that's all that was needed for me to already see noticeable results. I plan to do 2 or 3 more treatments over the coming weeks, but I think I might save the other strips for a later time. I had some discomfort for a day or two after the treatment but it was manageable. I took one regular strength Tylenol on the first day and that really helped.

I would recommend this product for the quick results, the highly effective seal, and the short treatment period (normally it's a 7-day treatment). Some sensitivity is normal, so pace yourself if needed, use Sensodyne or other sensitivity toothpaste, and make sure your teeth and gums are healthy before starting. I'm sold!

I received this product for free as a part of the Chickadvisor product review club.

I have used whitening products before with no avail, even went as far as buying a professional liquid one online. I didn't expect a lot from the Crest 3D Whitestrips Intensive Professional Effects, but I was pleasantly surprised. Within 7 days the product had made a big difference to my smile. I feel better about it already. I will certainly be referring it to my friends, and I will certainly be purchasing it again.

It was extremely easy to use, and stayed on really well. You can even drink water with them on and they are really comfortable. The only downside that I found with working 5 days a week and going to university the other two was finding 2 hours everyday to put them on.

Thank you again ChickAdvisor, for showing me another great product.

Not sure why my other review didnt post but will repost :)

I got the Crest 3D White Whitestrips Intensive Professional Effects to try and review. They are very simple to use and surprisingly stayed in place for the duration they were on my teeth. Once I took them off I noticed a slight difference in colour just after one application. After completing another my teeth were significantly whiter and the only downside I experienced was a slight bit of tooth sensitivity for 2 days but it was nothing painful or overwhelming compared to other methods of teeth whitening.

I give this 4 thumbs up and suggest anyone trying to get a whiter smile for any reason to give them a try they are a great value and often P&G;puts out coupons for these - I currently have a $7.00 off coupon from them and look forward to finding it on sale and getting my next box on a discount :P

The product works, gave me a noticeable white smile. Now for the negative, my teeth became super sensitive, could not even finish the entire box and had to use Sensodyne throughout the process. But on the bright side, it worked with just half the box.