Well not much else can be said about this case other than it is fantastic. It fits beautifully over the system leaving sufficient space for all the openings, lights and cameras. The plastic is durable and has, unfortunately!, been tested with a small drop, surviving marvelously.
Only a couple of problems with it: 1) The hinge is exposed, of course, otherwise it would not be able to open. A possible solution could be to have a bit of plastic that bends to accommodate the movement of the 3DS, but whatever.
2) The main problem - you may, if not will, have to ask your little sister to get the stylus out. It is quite difficult and awkward to get out, and i don't even have very big fingers at all.
Despite these problems, for under £4, this case is a must have. I highly recommend.