Quality of product being very average even think about a used product. The keys were all distributed indiscriminately in the box, key supports were broken and platelets on which are listed the different keys did not keep up because the screws holding were either screwed awry in the plastic support, ie Support was missing and keys were very dirty (grease). However the quality of the keys is good and variety make it an interesting product of this view. Usable product after some repairs of supports made by myself, which should not be the case for such a product.