My stay at Karen's place was really great. I spend 10 days there.
The localisation is awesome with supermarket just across the road. A nice place to choose in order to visit Sydney as many famous place just need a few minutes walk to be reached. Kings cross station near the apartment that allows you to go everywhere in Sydney.
The kitchen is a bit small but is really fine enough for a short stay.
The flat is really quiet although it is in the centre of Sydney.
The communication was really easy and Karen is a very friendly host. This place is definitely great if you want to spend good time in Sydney, would highly recommend !