I try to use these when I remember. However, for some reason when I have them on my teeth I lock my jaw and it ends up hurting my jaw very bad. They work great though and don't make my teeth sensitive.

These work really well and results are noticed right away after one use. They make it quick and easy to whiten teeth before events and to just maintain the whiteness

You will see a difference by using it 3 times. Each time you'll see a slight difference. They don't move around in the mouth so they will feel secure.

I've used these multiple times and they do work. They aren't going to immediately make your teeth white but overtime they will. Although I do have sensitive teeth and sometimes it gives me a very sharp pain on my tooth

Keeps my teeth white without breaking the bank. Pop them on during my shower and take them off when I get out. I usually whiten once a week because every day makes my teeth and gums too sensitive. Currently using.

You can definitely see results after every use. I just don't like how sensitive my teeth feel after using them but I've found out that if I use them for 30 minutes instead of 60 my teeth don't feel as sensitive as they normally do.

these are GREAT! i was already seeing big differences after like one use! my teeth are very sensitive and i can't use them often without my teeth hurting, but i use them occasionally and my teeth don't hurt and they're looking a lot whiter already!

Made my teeth super white with a few uses! I did one every day for 5 days straight and it left my teeth super white! I've never been so confident in my teeth until now

I purchased the crest 3D whitestrips reluctantly, taking a chance,but the results blew me away I saw a difference in about a week or so. I continue to buy this product being a great investment!

pretty nice and easy for an at home treatment! although i left it on for too long once and my teeth became sensitive so definitely go by the instructions