If I {Mind Control} my opponen's {Maalfeld Twins} then [a few turns later] it dies who gets the tokens me or my opponent?
You'd get them. Whoever is the controller of the card when it dies will get the tokens.
RESOLVED
Thanks! :)
No problem!
And just because I love rulings, Rule 603.03a talks about how the controller of the source of the trigger is the one who puts it on the stack.