I traveled to Dallas with my husband and 18 month old daughter for a week-long stay. Kathy's apartment was fantastic, and Kathy is a truly wonderful host. I am a tough customer to please, and Kathy met and exceeded my expectations. She lives on site, as others have mentioned, which makes her immediately available pretty much any time an issue arises (she comes to fix even the smallest of problems). She is responsive to communication and truly cares about her guests.
Because we were traveling with our toddler, we asked about a Pack N Play. Kathy investigated and ended up buying one for our stay! She goes above and beyond to accommodate her guests. She stocked the apartment with snacks and toiletries.
It was a very clean apartment. It is in a super safe area. I walked around at all times of day and night without concern. She's right that Dallas is easier by car (we rented one), but I did walk most days with the baby in the stroller and went to Whole Foods, Starbucks, CVS, Kroger's (the cheaper grocery store!) and other places. The Perot Museum was a 6 minute drive and is wonderful for children of most ages (my daughter LOVED it). We never had trouble finding free street parking at the apartment.
I would recommend Kathy's apartment without hesitation. She is easy to work with and I would absolutely stay with her again in the future.