Opal by Opalescence Go - Prefilled Teeth Whitening Trays - Gentle - (7 Treatments) - Hydrogen Peroxide - Cool Mint - Made by Ultradent. Op-Tr-Gentle (1 Pack, Classic)

I'm not one to leave reviews unless the product is outstanding or exceptionally bad. I'm not being compensated by anyone for anything. I'm just a guy... I am happy to tell you, these work great. I didn't think to take before pics but to be honest, in the right light, my teeth looked orange. I guess that's what I get for smoking for 45 years & drinking coffee for 40 years. My teeth are sensitive & I've had bad reactions to other products of this type over the years. I started with the gentle kit & used one set every other day. I wasn't happy so the following week I bumped it up to the medium kit & another gentle kit. I alternated the gentle & the medium with a one day break in between. That was about 2.5 weeks & my teeth look great. I've got plenty left over just for brush ups. These are great.

Got these before a wedding. I’ve had my teeth whitened before and find these good for maintenance. Worked well. Gentle. Didn’t irritate gums. Only negative is the trays are quite small. Had to push them down so they’d fully cover my front teeth - top and bottom. Other than that I’d buy again.

I’ve tried a lot of “white strip” brands, and these have been hands down the best. I was most impressed that they whiten all surfaces of the teeth, including between the teeth, which white strips can’t. I had zero sensitivity AND better results than I ever have with any other brand. The little trays suction around both sides of the teeth and the gel reaches all of the nooks and crannies. Highly recommended!

I have been using the gel based whitener by this brand that I have purchased from my dentist for years. I tried this out thinking it would work just as well without the cleanup of trays. The heavy material did not easily adhere to my teeth and felt awkward. I held out until the end hoping it would work by the last treatment but nothing was whitened as promised and was a complete waste of money. If you want strips, stick to the drug store brands.

Not really happy with this product! It’s flimsy, hard to use and the results are not ideal. I am going to try another product.

I am 67 years old. I have been a daily espresso drinker. I smoked for 43 years before quitting 5 years ago. I knew my teeth were stained, and although I brushed daily, I did not truly do anything else. My dentist recommended Opalescence. I have been using the trays and toothpaste daily. It has changed my oral health tremendously, and I smile so much more now! My mental health has also improved, as many more people smile back at me.

I’m a dental hygienist and I recommend these to my patients daily who have used crest white strips prior or in office made trays. These are much stronger but give great results. Remember to smear on sensodyne after use to help with sensitivity!

I did not see a change in the color of my teeth after the 7 treatments. Perhaps a second purchase was necessary. Warning, if you have sensitive teeth DO NOT leave the trays in your mouth longer than what the instructions state and I highly recommend brushing your teeth afterwards. I was distracted by my work and removed the trays as indicated but only wiped my teeth with a napkin and minutes later the sharp pain I felt on one side of my mouth brought several tears to my eyes.