Thankfully, my husband and I are in the position where we can afford kids' education in HK. I did caveat the start of my post by saying you need to earn over a certain threshold here - and clearly that threshold is higher with a family.
With a family we still have to make a living, and the real alternative for us would be London. But London loses for all the reasons I listed above.
We live in Discovery Bay and we love it, I can't think of a better place to raise a family whilst still being able to give them the opportunities working in a financial centre enables, and such accessibility to the great outdoors.