I saw Dr. Doo every 4 weeks and the cost was $900 for consultation and $1000 for ultrasound, which I had on every visit. As Nicole mentioned above, Dr Doo was also good about not doing unnecessary tests etc and asked me about my public hosital appointments so that he did not duplicate anything.
As for the public hospital, I found it to be fine. I was induced at 41 weeks, was in labour for 24 hours and ended up having an emergency c-section. At every step of the way I did not have any language barrier issues. Both my surgeon for the c-section and the anaestatist were Australian and all of the nurses on the ward spoke good English. I gave birth in the Prince of Wales Hospital (Shatin). The only issues I found were the food (many threads on this!) and my husband could not be with me for the birth but it was the time of swine flu outbreak so we had no choice there. I brought some cereal bars to the hospital with me and ate them until my husband brought me dinner! It was not a bad experience at all and if were to ever have another child I would opt for public hospital again (not that I am planning that though!!!)