Just updated my 3DS reviews page (http://www.atari2600land.com/3ds/) with a review of NSMB2. Not a very long review as I haven't played very much of it. I played through world 1 without losing one life, but I doubt it will stay that way for very long, and I started level 2 with 21 lives (you start the game with 5, I think.) So, I'm not going to divulge more than that, you'll have to read the review to find out how I feel about the game.