TL;DR: the place comes exactly as advertised; Luiz communicated very well; the pool, deck area, & patio were amazing; and I would be delighted to book this place again.
My booking process began a bit shaky, as Luiz had some personal stuff going on that made it more difficult than usual to book this place. I expect that it was a one-time occurrence and it all worked out in the end, so I wouldn't worry about it happening again. I would happily rebook this place for any of my future trips to Austin.
Check-in was very easy, and since no one checked out of the place the day we checked in, Luiz even let us check in a little early. The lock box was a bit finnicky, but it was easier to unlock than it was to lock back up.
The place was identical to its description. A nice, big living room with plenty of seating. A good (but not huge) kitchen and dining room with everything we needed on the one night we decided to cook. The bedrooms were spacious and comfy, but got significantly colder than the rest of the house. We partially-closed the vents every bedroom except the one with the bunk beds because they got so cold.
And the main attraction: the pool and deck-area. Phenomenal. There is so much space to hang out outside. Between the patio, the deck, the pool, and the hot tub, there was an excess of room for our 12-person get-together. All the furniture (inside, patio, and deck) was in great condition and comfortable. The entire outdoor area was clean. The pool was large enough for about 8 people with tubes, but easily fit all 12 of us without floatation devices. Since we stayed in early July, the pool was nice and warm all day. The hot tub was great, too - the jets worked great (after we spent a couple of minutes figuring out the controls) and it got nice and hot. The only problem with the pool (which I suspect is true of all outdoor pools in Austin) is that bugs would often fly into the pool, especially at night. We took about five minutes to skim the pool before every use, which was slightly inconvenient but not something that I can blame on the place or the host. I recommend making sure the edges of the pool (especially under the small lip) are skimmed thoroughly, lest your splashing release a dozen insect carcasses. Again, it's an outdoor pool in Texas - bugs happen.
If there's something I didn't mention in my review, either it worked exactly as it should (like the washer & dryer) or we just didn't use it (like the dog run outside). Overall, a wonderful place that I would book again without hesitation.