As a Platinum member with American Airlines, I hold Oneworld Sapphire status and get into Qantas awesome lounge in Terminal 3 at SYD. The breakfast food is so-so, but there is tons of space and strong wifi. At the end of the day, having space and better chairs is about all you ask for at airport lounges with the trend towards lounges being packed to the gills. It's bright and well-staffed too.
You may not get quite the same luxury as the AMEX Centurion lounges, but it's a step up from the Priority Pass "lounges" that are just restaurants here, and I'll take the space and comfort over amenities every time.
Verdict: Solid (6 / 10)