This is the second time I have stayed at the Sir Stamford (last time with my son; this time with my wife), and I merely review it again to confirm that things haven't changed since my 2009 review.
We were cordially welcomed back by the friendly reception staff; the young bellboy/porter happily took our bags up to our room with no expectation of a tip; and the room was clean and very well appointed.
We had a view of the harbour (albeit partly obscured by another high-rise).
But the location of the Sir Stamford is the best thing. We caught the train to the airport from Circular Quay station, so you don't want to have to drag your luggage too far. We had lunch and breakfast right at the harbour-side; wandered around the Sydney Opera House; caught the Manly Ferry to ... well, Manly; and had dinner at 'Fish at the Rocks' at ...The Rocks (separate review). All within easy walking distance of the Sir Stamford.
I held my nerve and waited until the day before to get the best rates on a room at the Sir Stamford from one of those last minute hotel websites, but I really wanted to stay here again. I'm glad we did, and hope to do so again in the future.