No, it really doesn't take much. I finally got around to watching the feature on the Extended DVD sets we got years ago, and while I'd had an idea from interviews and hearsay the kinds of labor that went into it, actually seeing miniatures and trucks of orc limbs and the footage is a whole different ballgame.

I wasn't planning to watch the extended cut of the movie except with the actor commentary, but I am. And may go back a third time for the production or writer tracks, if I'm not careful.
(Our family bandwidth limits are getting to the point I can't just watch dramas, so it's to old-fashioned DVDs for me.)

(also, the Lego game IS SO GOOD
I seriously sit watching the original saying to myself "OMG that was actually in the movie and I never noticed until the Lego animation showed it")