We did not manage to meet or speak to Jesper, as were contacted by Minty Host. Minty Host were very responsive and helpful so checking-in was smooth.
The apartment was actually much smaller than what was shown in the photos but it was really homely nonetheless. It was clean and it had everything you need. My mom was in love with the kitchen as it had everything she needed for cooking. There were numerous supermarts just within walking distance from the apartment. The Royal Palace is just about 8min walking distance from the apartment and all the shopping districts are also within walking distance as well (about 20min). We actually walked pretty much everywhere from the apartment.
Will recommend if you are looking for a quiet stay in Madrid.