Sue's apartment is fantastic. We stayed for a week and loved every minute. Location wise, its a few minutes walk to the main strip on 6th street, 15mins to the bars on Rainey street and if you walk east there are loads of bars and food trucks to check out in the east downtown area: our favorite was the Whisler. Oh and right opposite the apartment is a great taco truck, a small grocery store and an excellent coffee bar. We were considering getting a car, but almost everything you'd want to see in Austin is a walk/bike ride away, you can even walk to South Congress in less than an hour.
The apartment itself is well kitted out, a comfortable (proper) bed, good sofa, lots of towels, toilet paper, soaps etc. A good hair dryer ( these things are important! ) and pots and pans to cook with. There is also a nice balcony to sit at and people watch. And the aircon works well which is crucial in Texas! Communication with Sue was instant, and she did everything to make us comfortable, she's also great for recommendations!
The only downside is that the apartment is a few minutes away from the freeway under pass which is where a lot of homeless people stay. Its unfortunate but we didn't have any problems, you can walk clear of it and be on the main strip within a minute or so, and it definitely didn't put us off the apartment. We'd absolutely recommend Sue, the apartment and the location.