Large and very well equipped flat in an ancient building at the margins of the old city, and at a very easy walking distance from many interesting places. Relatively quiet and nicely furnished. If you come by car (as we did), the nearest cheapish parking is probably the underground one under the Origo shopping center (€ 12 every 24 h).
Anna sent us very detailed practical information, and we had no problems with our check-in. Recommended.