We recently flew from Adelaide to Auckland with Qatar Airways in the QSuite. On the return from Auckland to Adelaide, we were provided with complimentary access to the Strata Lounge before departure in Auckland Airport.
There is also the option to purchase access online 24 hours before your flight starting from $66 for a maximum 4 hours, or take your chances and purchase access for a higher rate on arrival, subject to availability.
The lounge is open from 4:30am until 11pm daily. After you pass through security and enter the international terminal, the lounge is located on the second level just after the large duty free shop. You’ll find the escalators on your right, heading to the Strata Lounge along with both Qantas and Emirates lounge.