Private apartment in the center of Madrid. Enough security (building lock and key as well as room lock and key) but it wasn’t a shady area.
Walking was most 30-40 min to get to the other side of the city and everything else in between was easy to get to.
Hosts were low touch, but enough support. Above and beyond for amenities, they provided chargers, and extras for everything necessary. Maps, list of best local places, and complimentary coffee and tea. We had no issues and were very pleased.