Kasa instructions and responses are quick and well-described. That said, I had some issues with needing to get out of a 2.5 month reservation due to major life changes and they would not change their 30-day penalty even with a 30-day notification which seemed egregious. They also lied initially and said they could not change it, but after about 3 phone calls with both airbnb and Kasa it was confirmed that they just didn't want to. Again this was with 30-day notice on my part.
The cost they charged was also comically bad, I now am renting a nicer place on a 3 month lease with rental furniture and paying less than half what I was charged to stay with them.
If you need a corporate rental, there are at least 4 options in Austin which will not charge you 30-day penalty if you need to change the move out date, and hopefully also not lie to you about their business decisions.