With a little skill and a light pressure the shells are quickly mounted on the 3DS XL. They are simply clamped to the device, but still keep safely in place.
Qualitatively, I can imagine nothing better than this case. It is made of metal, the lining is glued absolutely clean and all interfaces and control elements of the DS are perfectly cut out. Since shaking, rattling or pinched nothing and the entire painted surface of the device is one hundred percent safe from dirt and scratches.
The only drawback is that you can not choose the color, but must take what you get sent. I am with metallic blue but very satisfied.
From me, saying almost unlimited recommendation!