By cons at finishing, plastic is low-end (appearance, physical strength). On this point, the product is "cheap" (cheap). Moreover, I strongly advise against to frequently use the opportunity to fold the headphones: it seems that the system will keep our fingers. Only two small elastic tongues keep the plastic hoop in one or other position (normal / unfolded). All this does not inspire confidence.
Side seller "MyMemory" based in Britain. Very professional ... but the Channel crossing still took 15 days. Unacceptable. The seller is not involved (product shipped one day after ordering, shipping dates were given), but rather the mode of transport. Not recommended if you hurry. Customs fees may also be charged (and paid by MyMemory): amazing hour of Europe.
In conclusion, I am not satisfied with the appearance and construction of cheap product.