Hifiman's main achievement is their ability to create headphones with an airy, unobstructed listening environment. The headphones give a strong "feel-good" feeling. A possible disadvantage is that they spread the sound a little more outside the headphones. It does not become completely "private". Then they have headphones in qualities ranging from good basic to Susvara which belongs to the absolute top layer (if you drive it with sufficiently powerful products).