During installation I got annoyed by the attachment of the bracket on the bars of the headrest. Reason: The Allen screws must be fully screwed out of the holder to push the two halves of the holder on the rod. The nuts are not glued into the holder half, they fall out and need to be cumbersome in again pressed during the screwing. The supporting screw length is quite small (ie, the length of the thread, which disappears in the nut).
Proposal to the manufacturer either longer screws mitliefern (which then look however = ugly from the holders out) or the nuts in the holders stick (to prevent falling out). Then it would be clean 5 star ;-)