Location: 1 Martin Place, right in the middle of Sydney's CBD.
How big? There are 416 rooms and suites in a 31-storey tower that also incorporates the original former General Post Office building. The Tower rooms are modern in style and the Heritage rooms (in the old GPO) are in historic style, with high ceilings and antique touches.
Price: Tower Superior rooms start at $353 per night. I was upgraded to an Executive Room with access to the Executive Lounge - a perk of the Starwood Preferred Guest programme.
Check-in experience: Fairly quick (as you'd expect when arriving after 11pm) but the absence of a doorman meant that we had to lug our own bags into the lobby. No biggie, but not what might be expected in a five-star establishment (and which charges accordingly). I've encountered it before at the Westin, too.