I've never heard of them before, and not even now. I went to the web site and the only way to see any information about them was to view a video, and I don't wast time viewing videos. I can read information much faster than anyone in a video will show me, plus text and simple photos of the items in use would be much better than a video. I'm not saying web sites shouldn't have videos, only that it shouldn't be the only way to see information about the product.