Best DS game for me, hands down. Buying it next week from a friend for pretty cheap.
As some might remember I got a DS a couple of weeks ago, with Mario Kart DS, Mario 64 DS and Pokemon, played this today and thought it was absolutely brilliant.
I regret not buying it sooner, played the multiplayer in school today, it's the best multiplayer I've played since Smash Bros. Melee and Mario Kart: Double Dash!! if you have the game and haven't played the multiplayer, do it.