Overall, this is a good place. The host provides an air conditioner, fan, and space heater so you'll be cozy no matter what season you're there. Super close to a lot of great places to eat (I recommend Laundrette) and coffee shops, and you're a quick $5-10 Uber/Lyft ride from downtown Austin.
Elizabeth was very communicative and responded quickly, although I didn't receive any instructions for my stay until I emailed her the night before. But everything was all set and ready for us when we got there.
However, even though I really don't like giving a host less than 5 stars, I wished more reviews would point this out so I'll fall on the sword of being the guy who's honest:
1. There's really no way to use the bathroom and it's not easy to tell from the pictures. If you're visiting with a partner, one of you is just going to have to step out so the sliding door can be left open while using it otherwise you're squishing in there and it's really uncomfortable.
2. You have to enter the birdhouse from the alleyway and do not have access to the yard. It's kinda sketchy at night, there was a neighbor directly across who was staring out their window at me when I was standing in the alley using my phone. There's a rolling gate that you can close but you still feel pretty exposed because you can't lock it. With the wildlife in the area, you're going to hear some leaves crunching on the outside lawn as raccoons and birds wander through, so if you're slightly paranoid you're going to wake up a few times. Didn't help that I think the owner (or another guest?) put some cats out in a fenced-in area within the yard and were meowing all morning.
3. Only other minor complaint is that if you're used to little amenities, like being able to make coffee (I think the expectation is to use a hot plate and kettle but I had no idea how to do it and didn't want to mess with it) or some bottled water in the fridge (I know Austin's water isn't bad but wasn't sure if I could trust the tap water running into a shack), you might be disappointed there.
Honestly my girlfriend ended up convincing me to change our flight so we could leave early because she wasn't feeling it.
BUT, this place is probably the cheapest you can find so close to downtown so if you're solo visiting for just a night or two, you probably won't have any issue with it. I place more blame on myself for thinking it would be "good enough" for two people since my girlfriend and I planned on just crashing there at night and otherwise just exploring Austin all day.