The 3D technology, part one
"Instead of popping out, the 3D image feels like it goes deeper into the screen," writes the team over at CNET. "The best way we've been able to convey the effect is by referring to those old Magic Eye images that required some eye-crossing to get 3D objects to appear. Not to worry, there's no eye-crossing going on here, though some titles we played definitely took a few seconds of getting used to, especially with the 3D slider maxed out. On rare occasions the effect was actually overwhelming, which had us jumping for the slider."
The 3D technology, part two
"The 3DS does have significant drawbacks," writes David W. Ewalt of Forbes. "The 3-D effect works only in a limited viewing range, outside of which the image gets blurry. There are also concerns about eyestrain and the potential for vision damage in small children. While I didn't experience any negative side effects, Nintendo printed health warnings on the box and labeled it "3D mode for ages 7 and up." Notices also appear while you're playing, reminding you to take a break. Until someone works out a way to fix the technological limitations, I can't see 3-D gaming becoming the standard in the industry."