My shipment including a lot of wooden furnitures which requires quarantine and caused warehouse charges, other than that it is all fine overall took 4 weeks to get to Australia.
But I have different ground. I have decided NOT to transfer my mattress finally.
Because I searched the mattress sizes of HK's and Oz's, the length and width are a bit different. And for a budget choice, says IKEA, the price difference of a same mattress is less than $2000. VS the shipping fee $2500 and the uncertainty of bed frame size, I decided not to bring it along.