I got the game yesterday (Tues). I got really friggin lucky that the EB had a few extra copies of the ones with the demo discs because I forgot to pre-order the game

He called 2 people to make sure he could give me a copy with the demo disc since there was a couple extra's left.
So when I got it home, played the demo disc for about 15 minutes, then played MK for about a half hour, then had to go to bed since I work at 9:30pm so I have to be up at 7:30 to catch the damned bus. So from about 1pm-1:45pm or so I played it, then went to bed. 5 hours of sleep feels great
But MK is pretty fun so far. Can't wait to play it more

(Along with Mario&Luigi Superstar Saga which is gonna kick ass since I liked Paper Mario and Mario RPG)