After flying in from SFO the immigration process at SYD was great. As a frequent flyer I received an Express pass to speed up thru the immigration lines. The signs to the Airport Link was easy to find. If you are staying in Sydney for a week I would purchase the weekly pass which will allow you unlimited access to trains buses and ferries. As others have said the location of the train station at SYD is a long walk. Coming back to the international terminal for another flight was harder to navigate. The Air New Zealand check-in was all the way to the right side of the terminal but the immigration was in the middle of the terminal. Lots more walking. Luckily I had another Express pass. The terminal is definitely not user friendly. Coming back from my flight and having to transfer to the domestic terminal was a nightmare. Where's the free transfer? Instead like others have mentioned you have 3 options. I took the T-bus which costs $5.50 AUD. If I took train it would have cost $5.00 AUD. Last thing if you don't smoke get ready for the cigarette smell after you depart from the baggage claim in the international terminal.