I can totally recommend Heather's studio in Newtown ... and have passed on that information to a friend who travels to Sydney for work quite often.
It is light, airy, very clean, private and beautifully set up.
I loved that it is so close to King St ... great cafes etc. We had a great meal at 'Arabella' and went the to New Theatre to see a wonderful play.
I will definitely be booking iot foe my next trip to Sydney.

warm regards - Doris Grant