We had a wonderful stay in the apartment!
The location is perfect, Carlton itself is very nice and it's really close (short walking distance) to the city center and other lovely neighborhoods like Fitzroy. The apartment itself is spacious, modern, clean and has everything in it you need during the stay (well equipped kitchen, laundry, soap in showers, etc.).
The communication with James is great, he responds very quickly and tries to make the stay as comfortable as possible. I would definitely come here again when visiting Melbourne and 100% recommend it!