Engadget didn’t just get their hands on an iPad 2 this week. Up for review is the 3DS, straight from Japan. It won’t be released state side for another few months, so some minor changes may or probably may not happen between now and then, but Engadget provided some insight into what we’ll be looking forward to once it’s out.

The 3D effect is controlled by a slider, much like the volume control in the DS Lite. This makes it easier to adjust the effect to your eyesight, as every human eye has its own threshold for 3D to really work. Those who cannot see 3D due to visual impairment or just not liking 3D mixed with their gaming can leave it off entirely. The adjustability is also useful for saving battery life, which players will need to do. With the 3D option tuned all the way down, the maximum battery life for the 3DS will be 4 to 5 hours. Bring a charger with you for long commutes.

New to the 3DS is downloadable content. While it does replace the slot left open for old GBA games to the disappointment of many fans, it’s a welcome new feature. Since the PSP took strides to make downloadable portable content a reality many have been expecting it from Nintendo. The new slide pad similar to the PSP’s button mimicking an analogue stick also makes its way to the 3DS and is met with positive reviews form those using it. It’s smooth and easy to use and although placed above the D-pad, isn’t in the way. The stylus also expands and contracts to the user’s preference. To make up for the lower battery life, the 3DS also comes with a charging pad now to encourage frequent charging when it’s not in use. The camera, while nice, also doesn’t seem like much to write home about, though not many will mind this.

To see the full comprehensive review and some quick summaries of the 3D’s launch games, see the original article here. The 3DS will be $249.99 and launches in the U.S. March 27^th.