I had a great stay at Melissa's Airbnb, a private "accessory dwelling unit" detached from the main house. The space is private, cozy (400 sq ft-ish), quiet, comfortable, and has pretty much all the amenities you'll need, barring a dishwasher. The only wrinkle was that the WiFi connection, while for the most part worked well, was a bit spotty at times (notably for video calls). But I'm confident this'll be improved for future guests and perhaps wouldn't even affect others as is. Melissa is a fantastic host. She's quick to help, receptive to feedback, and is keen on making sure everything is comfortable and in good order. In short, I'd definitely recommend staying here if you need a place to crash in Austin!