I bought one a week or so ago and it is pretty good. The power it has for running the games seems to match or out do that of the Wii. I bought mine to have The Legend of Zelda: The Ocarina of Time. The graphics look better than they where on the N64 and Gamecube.
The 3D feature for Zelda is not that great and leaves you going cross eyed or your vision blurring. I tried playing it in 3D for a while but it just doesn't look any better than without 3D. I'm sure there are better games suited for the 3D feature, but IMO, Zelda is not one of them.
What it lacks that the original DS had, is an alarm, the 3DS does not have one, so I am still using my old DS as an alarm clock XD.