I stayed at Aaron's place with a group of 10 friends over a weekend. It was an absolutely perfect place for us. Locationwise, I don't think we could have done any better - this house is within walking distance of many of the bars and taco trucks of East Austin, as well as an easy walk to both Rainey Street and downtown. We had expected we'd need to drive/rideshare around but that was almost never the case.
The house itself was also fantastic. It was more than big enough to fit all 10 of us, with plenty of beds/pullout couches. With two different living room spaces, there was also a lot of room for people to hang out while others did their own thing. The ping pong table, and the deck/yard with cornhole were also great touches that helped make the house a great place to hang out for a few days.
Finally, Aaron himself was an outstanding host. He allowed us to check in SUPER early which was a lifesaver as we had some people who took a red-eye in overnight and wanted to rest. His responses were lightning-fast, and though we had no complaints I got the impression that he would have responded to any issues immediately.
I absolutely recommend Aaron's place, and would definitely stay here again in coming back to Austin with a decent-sized group.