Cactus & Comfort is aptly named! I stayed during SXSW. Getting rideshares to and from downtown was cheap and fast (outside of peak times—9AM vs 9:30 made a difference!). Linda is a kind and casual person, she was responsive and accommodating even when my own check-in planning was all over the place. King (Linda's dog) was quiet and friendly. She gave me a ride to breakfast one day, and offered to send me some cuttings of my favorite cacti from around the house!
Cactus & Comfort offers a very competitive price for the quality of experience. The house has anything you might need, and Linda goes out of her way to anticipate everything else. I found myself wishing I had more downtime during my stay just to chat. I'm sure there will be another time though, the food in Austin on its own is enough to come back for!