First of all, this is the most expensive for my journey to Australia but just feel ok to stay. Actually others things are fine but just for Airport shuttle service.
As I have small amount of cash and ready to go back, thus I asked the receptionist for the shuttle bus to international terminal. The receptionist was fully recommend to you that shuttle bus is the best choice but I cost 1 hour to get to international terminal. I felt the receptionist was eager to "sell" the service of shuttle bus. I nearly missed the flight and lot of customers in the staff were very angry about delay.
Do not take airport shuttle bus if you have a normal schedule and it is not reliable at all. Walk to domestic terminal and take T8 train, my point of view.
Shuttle service is an important function for the hotels near airport, please tell the true story to your customer.