The Sun, UKs most popular newspaper, has printed a story on their front page about a chap (bit old for a 3DS) who has been having dizzy spells after playing the device for three minutes!!!!
They go on to say when he tried to return the device to the store he was refused a refund... did he try to get a refund on his car when he was travel sick? Tell you what, I'd love one and I'll take if off his hands if he doesn't want to use it!
If you want to read the full story here's a link to the Sun website.