We booked the house during SXSW and had a great time. The house is located south of the city and it is very easy to go downtown with public transport (there is a bus stop right around the corner and then it take 20mn). The house itself is great and can easily accomodate people with 3 nice bedrooms. There is a nice little garden too which is great for warm evenings. Overall it was all very fine and Paolo gave us a warm welcome when we arrived, showing us around and making us feel comfortable.
The only thing people should be aware of is that there is a train line passing by and it can be a bit noisy but it is only few times during a day so not a big issue.
Enjoy the house and enjoy Austin :)