It is a very good experience staying at Hal and Sarah's house! Sarah replied to me very fast and the communication went very well. I asked if we can do early check-in and although we couldn't because there was other guest, we are offered to put our luggage first (it's very convenient if you travel without car).
The room is very different than the pictures because it is way more beautiful! It also has a new renovated private bathroom inside.
Hal and Sarah also lending us MYKI cards (Melb public transport card) for us roaming around the city (it's about $6 if you buy new one). If you have car, you can park it on the street. Just have a quick walk to the nearest train station and you're ready to go anywhere.
Overall it is a wonderful experience staying here!