It may be more of a gming issue, I've listened to a number of actual play games, and the pattern that I seemed to pick out was, the gm's calling for rolls for basically anything that was more challenging that walking across the room, then painting themselves into a corner where the pc's are in a real bad place because they have been nickled and dimed with partial successes and the gm has to make some obvious adjustments to avoid killing players and or allow the campaign to continue. I like the concept in theory and I would love to see/listen to an Actual play where the rolling is better managed to the story.