Alex's place is easy to get to, less than a 10 minute walk from either Central, or Museum, stations. Must be on the quietest street in central Sydney, as we had no problems with noise during our stay, especially at night.
As a two-storey terrace house, it is a narrow property, with a steepish staircase, but this is to be expected from this type of house, but unless you want a big, roomy place, or have a large party, it is fine, and has all you need.
The kitchen has plenty of equipment, should you want to eat at home (and there is a supermarket near by), the bathroom small, but clean, with ample supply of towels, etc, and the beds comfortable.
Alex responds quickly to any communication, and when he dropped some supplies around whilst we were there, readily took on board any suggestions we may have had about the place.
All in all, I would definitely recommend staying at Alex's.