It really depends on your group; I've run through two sessions of it before we stopped. For us, the thing we really enjoy about RPGs is the cooperative nature of them, and once you introduce an overtly competitive element into that, it can get pretty ugly if you have several "must win at all cost" personalities at the table. (which we do)
That may not be you experience with it though. The rules did seem fairly clean, and if you're into some friendly competition I would say to give it a try.