Our host:
Claudia was very responsive and gave us great recommendations! Her parents are so lovely and they physically checked us in and out of the flat (and we had to check in very late due to transit delays so it was very kind, and VERY appreciated). Her father also helped me parallel park on the narrow Ostuni streets, which was much appreciated.
The flat:
The place does not come with a private parking spot, but we had no trouble parking on the street that the flat is on (albeit the roads are very narrow, so rent a tiny car). The flat was just as pictured -- such a cute place -- and the AC worked well. The pullout couch is in its own room, separate from the bedroom and living room, which was perfect as my friend and I could have separate sleeping arrangements. The only issue we had was that we were briefly locked out of the flat in the laundry room: the door handle is finicky so don't shut the door while you are in the laundry room (only shut it if you are in the flat).
The location:
In the old town, this place is well-located. It is just outside the highly touristed area but a short walking distance to it (approx 10-15mins). Pizza mania, around the corner from the flat, had surprisingly good pizza and was still open to serve us food at 11pm on a week night! We wish we had stayed more than two nights!