The knob to turn off the 3D effect or attenuate is well thought out, but as much frankly, view 3DS games in 2D it has no interest.
The set is much like a DS, ergonomics is good. I agree with the view of some of the "plastoc" effect of certain parties, such as the hinge, with a small crunching noise slightly.
The big regret for now comes the games offered: nothing to put in their mouths, as seen and reviewed games (Rayman Raving Rabbids, Nintendogs, Pilotwings ... Street Fighter, Same if it is a new album, nothing fundamentally new or exciting to stay glued to the console for hours) with an adaptation in 3D view that - apart impress people - brings nothing new.
However, we realize that the graphics are technically superior to those of the DS. The textures and fine 3D volumes are remarkable. Pokemon Pokedex 3D have on a beautiful rendering.
The recent update provides access to the Nintendo e-shop, still uncrowded. The browser may be of interest to some even if for me it's just anecdotal: I have always found the use of web browsers on consoles (Wii, DSi, 3DS) relatively impractical.
Hopefully the release of Zelda and Mario suites give this console really deserves its interest, to see the potential it has in the stomach! This console may not be immediately necessary due to further indigent game library, but in time it should succeed brilliantly and without regret to the DS.