We had a short stay overnight in Austin, but the location was great! 10 to 15 minutes to downtown and there's so much to do in the surrounding area. The airstream is cozy and comfortable. The A/C was a welcome sight and it got comfortably frosty in there. We never actually met Marcella, but she communicated quickly through email and gave us complete access even when she wasn't home.
Host also provides pretty much any toiletries you can think of, so don't worry about that! A nice touch with some local toffee, too. Overall A + experience.