Stayed at Catherine's place for 6 nights. Apartment is small but well designed and furnished.
Followed the instructions for check-in/out and there was no problems. We decided to get an Uber from the airport as train would've been $36 (for 2) and the Uber ended up being $39 - less on return trip as earlier in the day.
Apartment is near King's Cross station, but we walked into the city every day which was around 20 minutes. Would have been less but it seems jaywalking is frowned upon in OZ - there are many crossings.
We went to the Apollo and Fratelli Paradiso. Both recommendations from Catherine and worth a visit, Apollo probably the better of the two (Although the other place has a beer called Cleansing Ale by Two meter tall co.)
Sydney awesome place but as you will find out - expensive. Great having kitchen and washing machine etc in the apartment. Catherine (maybe other travelers) left some stuff and it was great. Currently sitting in an AirBnB in Ho Chi Minh that is lacking in such details. Even the soap - Thanks Catherine... although my girlfriend forced me to buy some for our apartment (available down The Rocks area).