The product arrived damaged due to improper packaging. The suite is on the same logic. No manual or instruction, yet a piece of paper with a few black and white drawings that does not cost very much. In addition, the cardboard carton is poor: not solid at all. All corners are likely to bend. But when everything is assembled, it still holds. The lenses are slightly bevelled on one corner, probably a manufacturing defect. However, this does not interfere with use. Finally, the two most annoying things: 1. the magnets are in the wrong place to be functional (they serve mouse click). So, it does not work, I had to cut out the cardboard of a centimeter and a half. 2. The position of the Galaxy S4 (and I imagine it's the same for another smartphone) is oblique, duplicate seen! In reality, it is because the cutting is so random that the holes for the lenses are not aligned. Solution: I glued small pieces of cardboard that remained to elevate my S4 to one side. Total time of operations, including tests: 30 minutes. As I like to tweak, I was amused. In conclusion, for the price, I do not complain to me of the quality of the cardboard. Moreover, it works rather well ... once you cut half of the object (no, I'm exaggerating a bit!). One star less for packaging (damaged product) and lack of instruction. Two other stars less for very poor design: poor fit lenses and magnets. A star more for the price: it's 3 stars!