AMAZING! I bought this kit about a year ago, I did the initial 2 hours and had 2 tubes left in the kit, I have been using them as touch-ups every few months ever since. I used it twice today and my teeth are visibly whiter. I would recommend this product to anyone looking to whiten their teeth a few shades.

I agree that the molds are a bit hard to form. I use this product once or twice a year and I get fantastic results. I am a coffee drinker. Even the dentist tells me that my teeth are gorgeous. After the 2nd tray, my gums get very sensitive and also the space between my front teeth, so I do one hour one day, and then the other 2 trays a day later.

Right after I whitened my teeth with this, I didn't notice a huge difference, and was slightly dissapointed. The next morning I woke up, and my sister was complimenting me on my fabulously white teeth. :) I couldn't stop grinning in the mirror. Mind you my teeth weren't terribly yellow, just a slight discoloration. The trays are easy to mold, but hard to but the gel on, especially if you have a small mouth like I do.. I got the hang of it by the third tray though. VERY messy to take out. I didn't want to swallow the spit in my mouth, so it stayed in there for 20 minutes. Again, very messy. The tip of my tongue stung & so did the roof of my mouth, but really not a lot. No sensitivity today, but a TINY bit on the tongue & roof of the mouth lastnight. Definitely would recommend this to anyone; cheaper than the whitestrips, and does a fantastic job!

Rembrandt 2-Hour White does an average job of whitening teeth. My teeth were not very yellow; I don't smoke or drink coffee but do like chocolate. I expected more dramatic results than what I got, which was some barely noticeable whitening. To avoid the pain and discomfort that other users reported, I spaced out my sessions so that I did one in the morning and one at night for 2 days. After the 3rd treatment I had a tiny bit of gum irritation between my front teeth, but that was all-- certainly not a reason to avoid the product. I liked the trays but couldn't use them both at once because it made them much more likely to shift around and leak their contents-- not a good thing. So I did the bottom and top treatments separately. Overall, the treatment was less difficult and painful than I thought it would be, but I wish I had gotten better results! Next time I may try the Rembrandt Professional Treatment Kit, or maybe the Aqua Fresh version that uses similar trays.

I have tried a lot of products- none as fast or effective as this one... does hurt my teeth a little, but not enough to stop me from using it.

I would not recommend it. It was painful, and damanged my gums severely. I followed the directions carefully.

Performed the 2 hour whitening. Followed the instructions exactly. No discomfort at all - I'm not prone to gum irritation - only a slight peroxide taste, but very faint. But this product did not work at all. Maybe I'm one (1) shade lighter on a whitening chart, but the difference is indiscernable. I would only recommend this product because other people have apparently achieved results, but I think it is largely dependent on your teeth.

I dont smoke, so my teeth weren't as bad as some I have seen, but they are yellowed. I used TWO boxes of the Rembrandt 2 hour whiteners before I saw results! My hubby had better results with his (worse teeth) using Crest Premium Whitestrips. And he has only used half the box so far.

I was apprehensive to buy this product after hearing about how painful it could become but figured I'd give it a try. My teeth weren't yellow but had some stains and discoloration from drinking coffee. The comfy tray didn't really form to my teeth but I was able to use it as is. I didn't follow the directions exactly; I put the gel right on my teeth and then covered it with the tray. There was pain initially when I put it on, but nothing intolerable. The next day I looked at my teeth and they were bright white. I would def. recommend this product to anyone who doesn't want to wait a week for results.

I used to have pretty significant stains on my teeth and they were really bothersome. I got this because it was reasonable and I am VERY HAPPY. I don't use it as a 2 hour session. I use the whitening product in the syringe very sparingly in the trays, which I thought were a little hard to form, but not too hard. So I use a little in the trays and leave them in for 30 minutes wait a little bit put in clean trays with new whitening product for another 30 minutes and then put the syring in my toothbrush holder for use the next day. Sometimes I got irritated having the trays in my mouth so I would only do it for 30 minutes. All of the syringes together lasted me more than 3 weeks doing this, and my teeth are super white. Within one week they were white to where I was confident smiling, where I couldn't have imagined that before. I'm really glad I bought this, and not something more expensive. It got my teeth super-white and lasted me way longer than other whitening roducts.