Didn't check if there's sleeping area or spa service
Spa facility can only be prebooked if you fly on Qantas, otherwise other one world carrier passengers can only book when you arrive at the lounge . Apparently Qantas first class passenger gets a call a early earlier to have an opportunity to prebooked spa treatments
Overall good experience.
I didn't stay long, didn't have time to try shower facility or spa treatment. You wont be able to prebook spa treatment unless you travel on Qantas first class. I was traveling on BA.