My husband and I had a brief (very last minute) 2-night stay here on our first trip to Australia and Sydney. Not knowing anything about Potts Point, we hesitated at first with booking the apartment, worried that its Potts Point location would be a hassle getting to/from Sydney and the major tourist sights. It turned out that we enjoyed Potts Point very much. There are awesome eateries/cafes within walking distance from the apt, and the train stop is very close. An Uber ride to near the center of the Botanical Garden was only around $8 Australian dollars, but we easily walked there, too. There is a train stop at the harbor area near the Opera House and within easy walking distance to the garden. The taxi ride for two ppl on a Monday night around 10pm from the airport to the apt was only $40 Australian dollars (cheaper if we took the train, but we didn't want to bother with our carry-on luggage and transferring trains).
Although we did not meet Charlotte or Chris during our, communicating with them was easy. They provided thorough and clear check-in/out instructions. Their guidebook served as a useful resource (recommendations for eateries, walking/jogging routes from the apartment, tour options, train map, etc).
We generally liked the apartment (fresh, modern decor) and found it clean (with a few exceptions as described below). A few specific things: 1) the person in the apt above has heavy feet, and we heard (from the bedroom) brief stomping late at night and early morning; 2) the apt is next to a hostel and on one of the two nights, we were awoken by a very loud and disorderly young man outside/near the apt building. We didn't call the authorities as advised by the hosts' guidebook because the noise lasted only a few minutes; 3) there were visible light stains on most of the white face and bath towels that were provided (it smelled clean and my husband used the bath towel with the fewest stains, but I used a personal travel towel); 4) there is some mold in the shower.