delericho
Legend
What, IYHOs, are the benefits of the SC mechanic over freeform resolution?
Structure and consistency. If I'm running a negotiation with the Baron, the interrogation of a captured kobold, a chase through Mos Eisley, or an attempt to hack an Imperial network (all of which I have used, in two different campaigns), I only need to learn one single set of mechanics. Furthermore, the players know that they have to achieve X successes before Y failures (because I tell them) in each case.
With freeform resolution, they would be done when I say they're done, and no sooner. They wouldn't have any clear idea of how close they are to overall success. Furthermore, since they don't know how many failures they have to avoid, they don't get the tension of realising that one more blown roll will cause overall failure.
I also believe Skill Challenges (at least as presented in the 4e DMG) are considerably better for novice DMs, who might not be able to balance freeform resolution by eye.