I've won 1 already, a $250 freeroll ($67.50 1st), and got 10th place in a $2,000 tourney (1 seat away from winning money)..
I think i'd rather win tourney buy-in money at tables, then play MTT, rather than grinding at .10/.20 limit tables for 8 hours a day.
Plus, i'm not as good at limit as I am at NL, if that makes sense.
edit: I just don't really have the bankroll to be playing big NL games or 1/2 limit tables etc...