So far so good!!!! Ive only used this product for a couple of weeks an I really like it! To be completely honest, my teeth are already very white. I regularly whiten my teeth and have always used a whitening toothpaste and whitening mouthwash, so there really wasn't much to whiten. What I can tell you is, I will buy again on my own because IT DID NOT MAKE MY TEETH FEEL SENSITIVE! If you've whitened your teeth before, you know that feeling. Your teeth get so sensitive that air or any type of liquid, cold or hot, hurts them. This gel did not do that! Also, its SUPER CONVENIENT! All you do is add an equal amount as your toothpaste to your toothbrush and brush! No sticky strips and having to wait 30 minutes, and then another 30 mins after you take the strips off to eat or drink something! I LOVED this aspect of it. BONUS: They have a TSA-friendly size. I travel a lot and drink ALOT of coffee, so this is perfect to throw in my travel bag. The only reason I didn't give it 5 stars, is because like i said earlier, my teeth are already white. I want to continue to use over a longer period of time to see if it keeps my teeth the way they are or to see if my teeth start looking stained. I drink multiple cups of coffee EVERYDAY....so we will see!
*I received this product free for testing purposes and all opinions are my own. I WILL be purchasing and I do recommend it!