I received these headphones as a free gift when I recently purchased an amp. Quite glad I received them as a gift as I would be rather disappointed if I'd spent money on them.
I found these headphones to be a very loose fit even at the narrowest setting on the headband. The build quality is fairly poor and the materials used feel cheap. Furthermore, the coiled lead is coiled so tight it pulls the headphones from your head if you try to stretch it, making the quoted 1.2 to 4m cable length pretty useless! To top it all off the sound quality is, in my opinion, less than impressive.
I am always relunctant to leave negative reviews but I really feel there are much better headphones available at this price point. Personally I would recommend looking at a similarly priced set of Sennheiser headphones instead.