Ventura Downhill helmet

Does anyone know the reputation of these helmets? The reviews on youtube and amazon are positive, they even say that it is a helmet that other brands rename and triple the price. But I would be safer listening the opinion of people with more experience.

http://www.dejurstore.top/index.php?main_page=product_info&products_id=12540

https://www.amazon.es/Ventura-731135-Casco-ciclismo-unisex/dp/B001J3UHV4/ref=sr_1_1?ie=UTF8&qid=1507746698&sr=8-1&keywords=cascos+descenso