The registration and the manual are simple.
The workmanship and quality of the glasses has somewhat surprised me for the price. The temple seems to me very vulnerable to a break.
The first impression was for me as if the spectacle of a gum machine ... The 3D glasses for a 1 at the nearby cinema make a much more stable impression.
Previously holding the glasses but what they promise and are likely easy to handle with care. Should children use the goggles, I would advise to be careful, that could be the acid test of the durability. :-)