Quality wise and made its perfect, i like the smell of the new leather its like inside a new BMW car lol π anywaze my experience of the product was hate and love, first was hate, it totally makes the 6xx bloated a little bit on the upper mids, bleeding towards into d lower mids, making the 6xx more fat in sound, then the love came, i experimentally remove the inner foams in between d drivers and the ears, the magic came in, it totally makes the 6xx direct sound to my ears with no ringing, my guess d dekoni foam has the exact distance to my ears so it will give the higjs the chance to reach the ears first making the soubd balance rather making it bloated pls refer to pics, associated equipment schiit jotunheim wid stock preamp and vpi scout jr