My gf and I stayed for 2 nights in June and we would definitely recommend Diana's apartment.
The apartment is a perfect place for couples, it is exactly the same as on pictures. Everything is new and clean and the chaing apartment is well positioned - all the main sights are in walking distance. Diana is really nice and helpful - gave us the map and suggestions and also she informed us that next guests had late check in and allowed us to have late check out in the afternoon! Please note that the apartment is on 4th floor (and the building is without the elevator) in case you have difficulties with climbing stairs. We would definitely stay there again!