I'll take your colleague' bun bun. At least, she has good attitude and heart to work in HK. I always employ helper more than 35 years old. My previous one was 40 years old. She came to take care my two daughters, age 2 and 4 years old. She had no problems to stay up late and play with them. My present one is also 46 years old. She is also a very energetic person.
Don't always think that maids from Singapore are good. I lived in Singapore for 7 years. Most of the young couples send their kids and maid to their mothers' or in-laws' home. Majority of them do not leave their kids alone with the maid at home. They may not know how to cook as normally the mother or in-laws cook the dinner. Moreover, these maids are always under supervision at home so that they may not have any initiatives to work independently. They will only take instructions. When they come to HK without supervisions, they tend to do whatever they like and take advantage of talking to the phone freely.