Other mirror cubes I've used have each side divided in different proportions, making each of the 8 cubies a unique size and shape. This has each side divided into the same unequal proportions. The upshot of this is that you end up with one small cube, one large cube, three identically shaped long square prisms and three identically shaped flatter square pieces. This means that it's possible for it to look like there is just one piece flipped, whereas in fact some other pieces must also be flipped or swapped. The brushed look was vital in managing to properly solve it, which is a bit of a pity as I bought it to do blindfold. I shall have to buy a different one for that.