You get what you pay for
Separately, the string lights and paper lanterns are fine. Together, they leave something to be desired. That being said, they are a decent set for the price.
I appreciate their simple construction, but the lanterns require much patience and fine motor skill to assemble without accidentally tearing through the paper. Each metal frame holding every lantern in its expanded position is a single piece of metal (aluminum coated with a chrome finish that rubs off during assembly) that has been molded into shape and soldered to itself, and you must bend the frame at that solder point in order to fit it inside a lantern, so I worry that the wire will eventually break at that weak point. Even with careful and precise motions, it is easy for the frame to slip and haphazardly puncture a lantern during assembly. The loop in the frame that is meant to attach the lantern to a light bulb must be loose enough to slip the bulb through, yet tight enough to hold it securely -- this can be done after making careful adjustments, but also requires time and patience. If you have arthritis or clumsy fingers, I would not recommend these. I can't imagine someone ordering a large number of these to decorate a hall or something, as that would take an extraordinary amount of time.
The plug is awkwardly close to the last light bulb, so if you are planning to string these high on a wall or over windows, it will not be long enough to reach an outlet without an extension cord. I ultimately ended up re-appropriating the lights for the holidays, and used twine to string the lanterns up between two rooms in my apartment, knotting them in place. They look great, and the paper is so thin that they still fill with ambient light from either room, despite not being used as intended.