Well, for this traveler, we will not use taxi to/from SYD.
Was going to use UBER XL for AU$70 range to Darling Harbor from the airport, freaked out not knowing what pick up point to use so we opt for taxi just outside of arrival hall. Jet lagged and 11 hours of flight delay didn't help my judgement. After 10~15 mins of driving, we can still see the runway on our left! The driver took us on a scenic route that end up costing AU$97. Maybe this is the going rate for night travel...
From the port we have 6 people and UBER XL also showed AU$60 range. We were worry not knowing the size of the XL will hold our luggage and didn't want to split up. So, we went to the taxi line instead. At 8am, there was no one there but us. They called a larger handicap van from the line up and I made a mistake of confirming that we are Americans when driver asked us. Once all the bags are loaded and we took our seats, the driver told us it would be AU$25 per person to Int'l airport and not by meter. At this price we could easily ordered 2 XLs and with money left over. Just felt cheated and left a bad taste in our mouths.