There is no perfect nanny. Everyone I know who hires a nanny, me included, all have some problems. For me, my nanny loves to give them chocolates and sweets even though I tell her not to. She also does not let them take a nap in the afternoon even though I told her to. As a result, when my kids are home in the evening, they are very tired. But I just close 1 eye, as long as she does her basic job of looking after them well.