Its strength is in addition to the high-quality fabric, of course, the handle and the solid framework that not only ensures a uniform illumination, but also allows one-handed operation without disfiguration the surface. However, one-handed illumination is not a permanent solution, because you have to concentrate when shooting not only on the camera settings (and that is just as well to modify them, if necessary, what you partially need both hands), but the portrait shoot on the person that you want to photograph. If you still begin to handle with one hand on the reflector, which is not only silly, but is thought to act a little stressed out - what it is, too. Who wants to work sensibly with reflector, needs an assistant.
By the planar surface of the Sun-Mover, the light can also be used effectively and is considerably lighter than a more favorable reflector. In strong sunlight, the difference is clearly noticeable!
Disadvantage of the construction is of course that you have to buy a new sun-mover for each stringing :-(
I use still both models, with the 5in1 reflector is used with me particularly as a diffuser and rarely as a light blocker.
To get started I would recommend but first the neutral silver sun-mover, as the zebra-stringing you need more rarely, when you need them at all ...
Caution: the frame is under high tension. If you try to let him pick up with one hand, he flapping on with such violence that could easily kill a horse. So absolutely open with both hands. Unfortunately, one of the two handles is covered as long as the screen is folded together. Handling is therefore not easily and not without risk.