Hello and sorry for the delayed response
No I've never heard of this brand or tried it, but that doesn't mean it's adulterated and diluted like other brands. I did a quick Google search and it appears to be manufactured in Austria. When buying black seed oil be sure it's cold-pressed, first pressed, undiluted, and that the product clearly states there's no solvents used in the extracting. Some companies use deceptive labeling like "all-natural" but this only means that their black seed oil is also combined with other oils, which are also "natural."