Maria's place was clean and looked better than in the pictures. There were some nice touches, like 2 l water bottle and flowers on the dining table. Check-in with the key box was very convenient. Maria replied to all messages super quickly, and provided good instructions. She was friendly and helpful! For example, the wifi stopped working on one evening, but restarting the modem helped; Maria helped us to find it as it's located in the corridor, outside the apartment.
Location is really good, right by the sea. There's no seaview from the apartment, but you can see the mountains. It was easy to find free parking right in front of the building, however, it was low season. Due to low season, many nearby restaurants, shops, and bars were closed. If you don't come in January, there should be a lot of good places close to the apartment. Otherwise it's a very good starting point when going to Formentor.
There was some unpleasant smell when we arrived, and it took some time to go away (possibly from the toilet). Also, only one air conditioning machine doesn't warm up the whole apartment completely when it's cold outside; luckily there are also some additional radiators that can be moved around.
All in all, a good place to stay, especially for the location.