But the problem is that quality is hard to maintain, varying as it does with the skills and moods of the performers. It is common in this format for the performance to decay to a vulgar and perfunctory level; one has to trust to luck to see a good performance.
然而缺點是隨著演員的情緒、水準變化，品質難以掌控，比較容易流於粗俗草率，戲不成戲，要看好戲得碰運氣。