I got it last night, said I wasn't going to play it, then decided, as I was brushing my teeth, I'd just pop it in and watch the intro.
That turned into "I'll just play the intro!"
Then "Well, I need to get to a better stopping point."
and THEN "Oh, uh, I can't find a mirror to save, dang it!"
AND FINALLY "Ok, I just destroyed the big boulder, there's a mirror right there, it's like nearly 1am, and I have to get up in 5 hours, GOOD STOPPING POINT." Now, I am tired, but it's easy to tell, I am officially hooked already, not even two hours in.
P.S. - GP, your Z-button trick to draw straight lines is the most useful thing I've found so far with the controls. This is probably in the manual, huh? Cuz I sure don't remember it being in the in-game tutorial.