I stayed at Bob's place for 6 weeks to visit UTS. Before arriving I had doubts whether I would feel comfortable, because this was my first time using airbnb. However, everything turned out to exceed my expectations.
The room was tidy, clean, and well equiped, as were the bath rooms and the kitchen. The place is very central, a few minutes walk to UTS and also close to Redfern train station.
Bob is a very nice guy, he showed me around the neighborhood when I arrived. He pointed out good places to have lunch, shops, and the train station. Bob was flexible with the check in time as my flight arrived very early. He provided tips on what to see and what to do in Sydney and even helped me planning a campling trip.
In summary, it is a great place to stay!