These are great! I bought the ten pack without toothpaste and am on the 7th treatment. I have a noticeable difference in whiteness. The GOOD: -Easy to use -Works well to ACTUALLY whiten teeth -Great packaging -Fits well -Nice product packaging The only downside is the instructions aren’t super clear. I didn’t catch right away that you’re supposed to refrigerate these. It also doesn’t say how often you should use them. They do cause gun sensitivity for me so I’ve been using them every other day. It also doesn’t say how long they last if refrigerated. I would HIGHLY RECOMMEND the 20 pack if available, but it depends on where your teeth are currently at from a color standpoint. If you drink coffee every day, or if you smoke, the 20 pack is the best bang for the buck.

I enjoy drinking coffee, so I was very interested in teeth whitening. I was recommended this product by my dentist because it is effective. I had never used a whitening product before, so I didn't have high expectations. One box contains 10 trays, and I used it consistently for 30 minutes every day. I was able to notice the change in the color of my teeth with just 10 trays. Pros 1. Excellent performance. It is amazing that you can have white teeth in just 10 days with 10 trays. 2. Very convenient to use. Each tray for the upper and lower teeth is individually packaged, so you can use one at a time. 3. The wax inside the tray has a mint flavor, so you can use it without feeling uncomfortable. Cons 1. It is more expensive than strip products. However, it is acceptable because it is more effective. If you subscribe, you can purchase it at a discount of about 10% compared to the regular price. If I have someone who is concerned about tooth discoloration, I will strongly recommend this product.

I have bought this product a few times because I believe it works better than crest whitening strips. The first time I got it was from the dentist and it actually bleached a couple parts of my gums which is normal and went away but the two times I’ve bought it from Amazon it didn’t do that. I don’t know if that has anything to do with the quality but either way it does work. I will say the dentist sold it to me for $400 for the same amount and strength as the $87 one on Amazon. It also does make my teeth have a dull ache for the next day or two after using it just once or twice so I can’t go the full 10 days in a row. Overall I like the product and use it to brighten my teeth back up when I feel like they’re getting dull.

I was skeptical, but my student dentist at Georgia Dental College recommended it, so I thought it was worth a try. My teeth did get sensitive a bit, but only the next day and then the sensation is gone. It's noteworthy to mention that I had a dermatology appointment and she asked me, "listen, I don't want to get too personal, but your teeth are so white, what are you using?" I chuckled bc literally I only used it once before this complement, and my teeth were pretty yellow prior which is why my student dentist recommended it before we went ahead and matched my teeth to have crowns put on. Anyway, the dermatologist pulled up the product right then and there on Amazon and her and her medical assistant each bought a package. lol.

One of the teeth whiteners ever had! Blows Crest white strips away! Also, If you go to the dentist and they offer you this exact product.,Amazon beats their price by $30.00 cheaper and the dentist office only gives you 10 in a box where on Amazon, you get 15.. Buyer beware!

These do not seem as strong as the Crest whitening strips. With those I tend to notice an increase in whiteness very rapidly, and it is quite drastic, but these have been kind of disappointing overall. The nice thing is that I had virtually no sensitivity with them. There is gel inside the trays that is all at the bottom so perhaps it doesnt fully cover the teeth. The flavor is great! Overall not worth it for the price since the crest strips have worked much better.

Exactly as advertised and delivered in a timely fashion

A few years back I used this whitening kit and I loved it. I could see the foaming while I had the guards on and after wearing for an hour and repeating for several days I saw good results. I recently bought it again to use and I have been very disappointed Maybe I got a bad batch of trays. I’ve used it 4-5 times and each time I saw nothing happening while I had the guards in for an hour. Then, when I take the guards off there’s no sign of anything happening. I wish I could get my money back or even exchange my box of 10 for a new box of 10. I maybe should’ve returned it but once I opened it to use there’s no returning. I keep trying it hoping it would work but nothing is happening. There’s no whitening at all. I won’t be buying this again unless they want to send me a new kit for a refund to prove me wrong. It’s a fairly expensive kit for it to not work. I’m very disappointed!

Sirven perder y son muy cómodas

Great product! Dentist sell this particular brand, at a higher cost unfortunately! I have had trouble with Amazon restocking this product. I recently purchased Crest 3D white strip, which don't work quite as well! Please ensure Opalescence Go are alway in stock!

I saw on some YouTube videos that this product was recommended by several dentists and orthodontists. I tried it and then saw how quick and effective it worked. My gum became a little sensitive after 9 days so I spaced a few days between application and it was much better. After 6 months, the whitening effect is still there. I would like to do it again to make them even whiter.

Good product. Does the job

Sentí sensibilidad los primeros 2 días y fue disminuyendo los siguientes días, lo volvería a comprar