The function is basically good.
The supplied protective case is actually much too large for the glasses. This flying around in the case. I recommend to do the glasses always in the supplied protective pouch before it is inserted in the case that there are no scratches on the 'glass' is possible.
BUT: in my copy there is a shortage on the left hinge. The locking pin is not properly 'installed'.
The beudeutet that the pin out is uncomfortable, which would not be too bad yet. But since the pin is not completely immersed in the holder, the temple is held only on one hinge side.
I do not know if it will not come here sooner or later problems.
But I am not willing to take that risk in a product in this price range and will therefore complain there.
PS: No, the pen can be reinschieben not easy, I have naturally tried.
