If you are still having natural periods then it's best to take it cyclically otherwise you will get unpredictable bleeds and you won't know where you are, I would say. If you are near to menopause then some gynaes do suggest trialling a continuous combined regime, if ovulation is only occasional, but then reverting to cyclical if bleeds occur randomly.
I'm not sure how many women take it continuously who are still very much peri-menopausal ?
Hurdity x