The holder doesn't look as clean as using badge magic or sewing but I can see it's purpose.
We are trying to reuse and recycle our uniforms as much as possible and the one challenge in handing down the shirts, is the damage the 4 patches leaves on the shirt either sewn on or by using badge magic. He can learn to sew the 4 other patches, no doubt it's a useful skill. I would caution that if your kid is the only one with the holder he may feel awkward or maybe he'll start a new trend, you never know, so be sure to check with him before you buy it. I know quite a few parents around here w
