Bill's house is fantastic!
The location is convenient because it is super close to Southern Cross Station! Just take 3-min walk! Also, there are different free tram station nearby to get us go to various places, such as Victoria Market, Melbourne Central, China Town, etc.
You may find Coles in 2-min walk to get everything you need.
The entire house is clean, tidy, spacious and exactly the same as the photos shown. The bathrooms are big. There is an open kitchen that you can make simple breakfast. Wifi was stable except the first night.
All in all, I would recommend everyone to stay in Bill's house whenever travelling in Melbourne.