I spend two very nice weeks at The York. The rooms are very spacious (not giving you claustrophobia the one day it might be raining and you spend more time in the hotel room than expected) and clean.
The hotel staff is pleasant and happy to help you.
The pool area is not very interesting and with little sun during the day, but this is Sydney – go to the beach!
From The York you have easy working access to The Rocks, Circular Quay, The Sydney Opera House, The Harbour Bridge and Darling Harbour as well as shopping areas as George Street, Westfield, The Strand and QVB. The Wynyard station and bus terminal is just around the corner.
The York is placed next to one of the access roads to the Harbour Bridge which can be quite noisy during the week, but this can be said about all the downtown hotels in Sydney as this is how the infrastructure is built in Sydney