An outstanding place, far above average!
What struck me immediately on entering the rental was how good the furnishings and linens were--towels better than I have for myself, fo example. The photo art all over the place was Dallas-specific and very nice (and I lived in Dallas for nearly 60 years before moving to Oregon, so I know).
The kitchen was very well laid out and the larder had more than usual. More than just coffee, but there was good ground coffee too.
The kitchen also has a small work area, where I enjoyed the fast (~12+ Mbps) internet.
The bathroom is also very nice, with a huge shower.
A good example of Karen's nice touches is the power strip on a bedside table, several outlets and two USB ports. I very much appreciated not having to pull the bed back or string my own extension cord!
Karen's responsiveness came into play only once. When I arrived, something was wrong with the wireless connection, but Karen had it remedies within two hours of my telling her about it.

I've stayed in a lot of Airbnbs, here and in other countries, and this is truly one of the nicest!