This serum resembles a thin oil type substance. Only two small squirts on the serum are needed per application. Simply rub the serum between your hands and run your fingers through your dry hair to the tips, avoiding the roots. Then style as desired! The serum keeps any stray hairs at bay and leaves hair feeling silky smooth and shining like diamonds! It really does live up to its name.... It gives a brilliant finish, without weighing hair down or making it appear lifeless! It's perfect for finishing off that classic look! You'll be the envy of hair models the world over! Brilliant shine, brilliant gloss, brilliant finish, brilliant product! A word of advice for those with fine hair, use an even smaller amount if the product per application, too much of this product on fine hair could weigh it down or make it appear flat. An all round well developed, easy to use product.