We had a great time at Silvia's. the apartment is really sweet with good space and light. It's a convenient 5-10 minutes walk into the old town and has everything you might need to have a great stay including a very nice roof terrace with a view to the sea.
We did have a problem parking. It was a particularly busy time to be in ostuni as it was Easter weekend but we got stuck a couple of time driving our large car (not our choice - hire car!) around the tiny lanes near the apartment. If you are driving I would recommend parking a bit further away from the apartment and walking the last bit.
All in all a great place to stay. Thanks Silvia