The only thing I did "complain" about is the color. I ordered him in white, but the color is more grayish white. Not sure if that only with my now so and thus quasi a production error, or whether the look generally so. Because it is virtually inevitable one of the trims to buy to make it look nice. I once made a picture of it and added it to my review.
But as we all know that's just a beauty flaw and does not change the system and the quality itself, but if someone can use as an exclusion criterion for the white and of reason to buy the Black 3DS, I'm glad if I helped: )