I can just see kids swinging their DSi around and smacking it into something and breaking it and/or whatever they smacked into as they play....including their fingers. The top screen won't take too much of that kind of abuse before the hinge breaks. Heck, even just swinging it around without smacking into anything could damage the top half, depending on how fast you move around. They didn't show that in the ad did they? No, they didn't.
While the game looks kinda fun to me, I don't like the idea of possibly smacking the DSi into something.
But then I don't have a DSi, just a DSlite, so I'll never play the game anyway. I don't even know anyone IRL that has a DSi. That's too bad, I wouldn't mind giving this game a go.....after making sure not to have any obstacles to smack into around me, of course.