I think not only can you be mor flexible but you also know where they are up to so to speak. For example when my husband and I do a half day each with the bub I find it difficult to know where he is up to. Even if my hubby tells me when he last slept etc I still find it a bit difficult. When I am with him from the morning I know what time he had all his feeds, his sleeps and how long for etc. and the day seems much smoother.