I'll save my money by not buying this one. Too pricey. Baking soda works just as well if not better

I used the regular whitestrips, not the 3D version. They were effective and gave noticeable, quick and lasting results even on already white teeth. The product definitely brightens up your smile. The test strips (before the product was available in Canada & was being tested in the US), were larger and held better to the upper and lower teeth. The strips were broader allowing them to be easily wrapped behind your teeth. That being said, it's not easy to keep both the lower and upper strips in place at the same time for a treatment. It's hard enough trying to keep one strip from sliding out of place. The product is on the pricey side but worth a go for an at home treatment that isn't time consuming or messy and works.

These work really well and my dentist told me they are pretty much the same thing that the dentist sells but I found they made my teeth extremely sensitive.

These were not cheap full price, but I did find them on sale! I found that these strips were far too intense to use at the recommended rate. My teeth were sore after daily application, and became super sensitive - something I wasn't into. However, once I switched to using them once every two days, my teeth were not in pain, and I noticed a MUCH whiter smile which lasted for months! My dentist also said that using the whitestrips myself was a smart buy, because I was able to control the intensity of them (how often/long I used them for) rather than professional get my teeth whitened. My teeth are generally white enough, but these really took my smile to catalog-level ;)

I just tried a sample of Crest Whitestrips that I was supposed to leave on for 1 hour as indicated in the instructions. I ended up ripping them off after 8 minutes out of fear when I felt a sharp tugging pain in one of my teeth (which has never had a cavity or root canal or anything like that). They were also tricky to apply and did not cover my teeth properly no matter how much I tried to stretch them as indicated in the instructions. I've seen how much they cost in stores and I will definitely never spend this money on them. I am better off getting a professional treatment from a dentist where I feel like the health of my teeth is in better hands.

I used this product twice a day for 30 minutes at a time. Initially, there's a bit of a learning curve regarding the proper application of the strips since they're easy to bend or fold. I received satisfactory results after about 2 weeks of using the strips. Cons of the product include:
1) Usage of the strips can result in the overbleaching of your teeth which can lead to sensitivity.
2) Crest Whitestrips are a little overpriced in my opinion.
3) Crest Whitestrips only cover your front teeth.

I tried the 2hr strips and never again, my teeth ached all night. I had to take Advil the next day and was so sensitive I didn't want to open my mouth. I've used the other intervals with comfortable success but I'll be stealing clear of these 2hr ones

These are expensive, but not as expensive as a trip to the dentist.

My teeth were slightly sensitive after use, but that is absolutely normal. It wasn' t unbearable, I just couldn't eat ice cream, or ice water until at least the following day. I have noticed a huge improvement in my smile, and I keep a few in my makeup bag for a touch up before a party. I would highly reccomend, but I just wish they were a little cheaper.

I have used bleaching mouth guard-type appliances before, and they make me gag. The white strips did not, and I could still drink water with the help of a straw. I could speak, but sounded funny, but it was far better than the dental trays.

Great product. A bit too pricey.

After purchasing these and wearing them only for a short time I had terrible aching pain from my teeth for several days and they became extremely sensitive. I would rather spend more at the dentist on professional bleach which I have never had this kind of reaction from.