Mythic GM emulator

I sort of gave this thing a try while planning out the "Redline to Carson City" adventure for this Sunday.   It wasn't all that useful as a GM planning tool, it kind of boiled down to "keep flipping a coin."   My questions were pretty simple, like "Do they get across New Mexico?  I could see the use if you had a bunch of people and no GM and people had a wider range of questions which had a wider range of probabilities than I was using.  If you were asking "does the washerwoman have the key of Gargamel?"  and "did the gatekeeper leave the halberd behind?" it would make using the system more interesting.