I delivered (my 2nd) at Matilda last March, so I'm about a year out of date on prices. All up it came to HK$76k, which was a normal delivery, epi (paid for but not used), private room. Our insurance didn't cover 100% and we paid the balance from our own funds.
I chose not to go public for a number of reasons:
1. better care - I know medical care is supposed to be great at public hospitals, but other care could be better. It isn't just about the food and the room, it is about having the baby with you, not in the nursery, having your husband with you at all times, helping with breastfeeding, etc.
2. I personally believe that if you can afford to, you should use private health facilities to save the drain on the over crowded, under funded public system.
3. Choice of Dr. - I used Dr Dawkins (an Australian) and he is great.
A lot of women travel back to Australia to give birth if they cannot afford private hospitals here.