Good, but causes sensitivity for about a day.

Whitening products are known to interfere with sensitivity, but I do want to caution you to consider using these carefully if you have sensitive teeth. I do and while it wasn’t my worst experience, my teeth were extremely sensitive for a day after using this. If you think that’s worth it for the whitening experience, go ahead, but I wanted you to be aware of that.

If you don’t have sensitivity though, forge on, because this does whiten your teeth, even after one use (see pictures), though due to sensitivity I wasn’t able to continue on with the product. The instructions are also a bit unclear. It says to use once daily, but then also says only use twice a year. After doing a bit of research it seems you are intended to use the whole pack, all ten strips, once a day, but they don’t recommend repeating this more than twice a year.

The downside of this is it means you need around an hour and ten minutes every day wearing this. That’s because the light takes about five minutes (maybe a tad longer) per set of teeth as well.

If you’ve used whitestrips before, you pretty much know what to expect. They do stick to the teeth well, not the most comfortable thing in the world, but bearable. For me, the thing I see again and again with whitestrips is that the bottom one is not long enough. It’s designed only for the front teeth, which is fine, but because it stops on the ‘corner’ teeth, it never clings there and I find the loose plastic really annoying in my mouth.

It’s definitely bearable, but an hour is pushing it and I don’t recommend them to those with sensitivity. The light is comfortable enough to hold in your mouth (though quite big) and kind of feels like a mouth guard. You can hold it with your hand, or when needed use your mouth alone to hold it.

Even after only one treatment I noticed my teeth were obviously whiter, but because of the sensitivity I can’t use them again. I tried them on my partner and they worked really well, so I recommend them for those without sensitivity problems.